DIY Solar Powered WiFi Weather Station V3.0 || Monitoring Wind and Rainfall

[@keithemerson9349]

Hi from the UK, A very nice, well documented project. I've completed the build and now in the "field" testing stage. I think that the criticisms surrounding the components were a bit harsh. With a bit of checking all my components fitted the board OK. The quality and service from your PCB supplier was excellent. I did find that the WiFi range with the internal ESP32 aerial was insufficient for my needs. With a little surgery on the PCB (cutting the tracks to the internal area) I managed to add a U.FL SMD aerial socket and plugged in an external aerial. This increased the range significantly. Sunlight in the UK is somewhat lacking so I also added two slightly smaller solar panels which cover the entire top area of the enclosure. My first over-night test ended up with the battery being fully discharged. Looking at the code I think that thingspeak data is transmitted once every minute so this may have been part of the problem along with no "deep sleep mode". As a short term fix I may link the rate of data transmission to the Lux sensor and reduce transmissions particularly over-night. It would be great if you manage to get the deep-sleep mode working. Thanks for a great project.

[@mehmet.5237]

hey bro how much time did it take to finish the project and can you help me with it

[@keithemerson9349]

@@mehmet.5237 It has been a couple of years since I built it so I'm not sure of the time to build. Once you get all the electronic components and PCB then you can build it in a day or less. The 3D printed parts may take a few days to complete them all. The biggest issue I had was battery drain and trying to get "deep sleep" to work reliably (See comments below). I never fixed this. Maybe an update will come along ? The design is nice and when working gives good information via the phone apps. Maybe I'll try again.

[@FVBmovies]

Great quality video. Side-note: for anyone making, consider where you place it, because solar panels need cleaning from time to time.

[@area1482]

Great Project! For v4.0, have you considered adding air quality sensors such as a PMS5003, MH-Z19, PM503, and MQ-131 sensors? Some have fans, so you would probably have to add more solar, design a larger "roof", but they would be some great additions!

[@tpobrienjr]

This project, the design, and the video are excellent! Thank you!

[@MichaelLloyd]

Wait till you get all of the parts that he supplied a list for and find out that they expensive bits, like the ESP32 board and the solar charge controller DON'T FIT the board. The ESP32 that he linked to has 6 extra pins! The board design doesn't work for the parts that the author recommends. This is a crap project that is good for nothing but selling parts.

[@JohnWeland]

This is great. I was looking at building something like this to put around various places in my rural community and have them all log to a database somewhere location and data, then use machine learning to make inferences.

[@kodywillnauer9422]

Just bought your board from PCB Way. Looking forward to this project. Some pieces are out of stock in my country but my hope is I can tinker with this in time for spring.

[@linearburn8838]

On a vs 4 I would use soem dioads to make it polarity agnostic for the battery

[@sebydocky5080]

Your V3.0 is great .....I build sometimes ago such kind of weather station.... I had problem to waterproof the UV sensor.... despite gluing everything as u did..., the sensors died from the rain fast.

[@opengreenenergy]

I am using it as an experimental basis. I will update if I face any problem in future.

[@keithemerson9349]

I added an I2c FRAM board for storing variables which is not affected by power outs/full resets. This was fairly easy to incorporate and replaces the RTC variables I was previously using. The unit ran for about a month but was logging resets. On one occasion it stopped for a couple of days but re-started when a rain tick seemed to bring it back to life. It now seems to have stopped completely and I need to get the ladder up again and get it off the garage roof! I've searched everywhere for solutions and tried all sorts of things (bigger capacitors on the power supplies, retry-loops if not connecting to wifi/Blynk etc etc) to stop the unit from crashing but haven't succeeded. I'm currently thinking about abandoning deep sleep operation and see if the unit keeps going despite the additional current draw. I would be most grateful for any feedback on others experience, particularly if using deep sleep mode, and hopefully any fixes

[@50shadesofgrade]

Great project bro❤

[@shas150]

Great, thank you, I was waiting for it!

[@opengreenenergy]

Glad to hear from you

[@twitchkesitleri3650]

I am watching you from Turkey, can you make sun panel street lighting?

[@opengreenenergy]

Thank you, your request is noted.

[@viveksharma7675]

@@opengreenenergy please make one 🙏❣ . Loved your videos 😄

[@opengreenenergy]

Thank you

[@jumcopper]

Simple

[@vladhristov2316]

Great JOB! Thank you for posting all the data and your work here, so we know they are still great developers out there. There are 3 SparkFun Sensors(Wind speed, Wind Direction, Rain flow), but you have only TWO RJ-11 connectors on the board?🤔 Also, where do we need to change the design to allow the board to check for the Battery level? Thank you in advance!

[@CMDRSloma]

Why not MQTT??? It is more universal. I would like to hook it up to Home Assistant.

[@opengreenenergy]

My plan is to implement MQTT with Home Assistant.

[@CMDRSloma]

@@opengreenenergy Thank you, this will be really great. Is ESP32 better ESP8266 in terms of battery life?

[@opengreenenergy]

I need some more time to give the final decision, because I am still now working on the software

[@CMDRSloma]

@@opengreenenergy All great things need time, don't need to rush it.

[@jospa6880]

@@opengreenenergy looking forward to the home assistant integration.

[@weijde12123]

I've made it possible to flash ESPhome onto this board and connect it to Home Assistant with all the sensors. If you're interested in the code let me know.

[@opengreenenergy]

Congratulations 👏 Please share with me the code to my email [e-mail]

[@chad77]

@@opengreenenergy I would be very interested in seeing/getting the code/procedure for flashing ESPhome and Home Assistant integration.

[@georgeg8066]

Great work thankyou. Q: Where is the Dallas one wire external sensor in the thinkspeak? You are only using BME280 for temp,

[@titomonsal]

Hello, can you post a list of components, so to migrate your scheme to ESPHome? This would change this projetc directly to Home Assistant!!

[@alaincesarini5284]

Thanks for your video. Is it possible to have the value of each component for exemple : R1 = ohm, R2 = ohm , etc, capacitor C1 = uF, C2 = uF, etc ? for PCB version 3.2

[@tjwatts100]

Wow That's really nicely made.

[@TheJakeRobinson]

thanks for a very clear instructable! cheers

[@opengreenenergy]

My pleasure

[@rickmccaskill7888]

Great design. Thanks for sharing all the information.

[@chrtrv4245]

Haven't you ever thought about controlling your project with Home assistant? It is a home automation hub that can be easily used to manage weather stations connected to irrigation systems.

[@opengreenenergy]

Yeah I am working on it

[@chrtrv4245]

@@opengreenenergy today I have connected to home assistant the 2.0v of your meteo station. All work well

[@chrtrv4245]

@@opengreenenergy When do you plan to release version 4 of your weather station? What differences will there be compared to the 3?

[@keithemerson9349]

I have now got to grips (to some extent) with using deep sleep mode and RTC variables so that I don't lose data and can track rain ticks. I use the RTC clock for an hour timer to track rain ticks and configured the system such that the processor wakes up if it receives a rain tick interrupt. I am still having issues with the system "stopping" after a variable amount of time. Possibly "brown-outs" / repeated resets. I have hacked the PCB so that the ESP-32s board is powered directly from the battery and the sensors powered from the MCP1700-3.3V regulator (I have removed the tracks from the ESP-32S 3.3V output). This seems to help prevent resets and low voltage issues with the sensors. I noticed that james hughes is working on similar issues and looks as if he is trying things such as disabling brown out detection and getting clock information from the internet. I shall follow his work with interest.

[@jameshughes8481]

The minute I downloaded source code and saw no transfer of variables to RTCMemory, I figured you don’t have deep sleep working yet. Do you have a plan of attack yet? Tie the tip counter to the WAKE pin? External counter that can be read/reset? Microcontroller reboots coming out of deep sleep and all is lost (experienced on my LoRaWAN projects with ESP32).

[@opengreenenergy]

Can you modify the existing code, so that it will implement deep sleep. Thank you

[@jameshughes8481]

@@opengreenenergy Here’s the issue, it’s not just a software fix. You need to tie the rain tip counter to the EXT0 or EXT1 on the ESP, else you are missing that count while timed sleep is happening. Let me see if I can breadboard a fix, then we can talk software and using RTC memory to store persistent variables. Happy to help. When controller wakes from sleep, it needs to then determine if it was a timed event or the EXTx (to issue the rain_tip_count++). Do you have full schematics available, I have not come across them yet if they are published. I’m somewhat in the dark as my PCBs are a couple days away from arrival.

[@jameshughes8481]

Here's a quick video on RTC storage of variables. kzbin.info/www/bejne/n5uQmZ2wq5uEgbs. We know we need the rainTicks to persist while ESP is in deep sleep. We will also need to determine WAKE source.If RAIN_PIN wakes the device, increment rain_ticks and go to sleep, if timer wakes device, business as usual with WiFi connect, etc.... By hardware change, not sure if we can use interrupt on the GPIO RAIN_PIN and set that pin to wake the device. Might need to feed this pin to 2 pins instead of one? Do you see issues with false counts on the RAIN_PIN? I'm curious if debounce needs to happen on the reed switches. I'll be able to formally investigate when my PCBs arrive.

[@opengreenenergy]

@@jameshughes8481 Hi the schematic available on my Instructables Page www.instructables.com/Solar-Powered-WiFi-Weather-Station-V30/

[@opengreenenergy]

@@jameshughes8481 Hi James, we may discuss more about the project. Please connect me through my email [e-mail]

[@varun07ch67]

please design a batteryless mppt with usb port(mobile charging) for 12v 50w panel

[@opengreenenergy]

Noted your suggestion.

[@bhbane592]

What i ask me every time i see your weatherstation. As the board isn't water proof isn't it that small animals, spiders etc get into this case and perhaps cause a short circuit?

[@splitscreenjc]

Great video - I have pretty much all the components to make that work - apart from the PCB. Will get on it.

[@opengreenenergy]

You can get it one from PCBWay. The link is in video description.

[@keithemerson9349]

Update. I'm using two 3000mAh batteries in parallel. I've implemented an internal timer (based on millis()) and only transmit data to thingspeak at intervals determined by a combination of the battery voltage and lux level. If the battery is good and light levels high then I transmit data every 5 minutes, I then use 10 and 15 minutes for intermediate values an down to 30 minutes if the battery is very low. I've also implemented a different routine for wind speed which seems more reliable. I have had an issue after the station has been on for a couple of days where thingspeak stops recording data? If I plug the unit into the PC then everything appears to be OK? I have also occasionally had a "PSRAM ID read error: 0xffffffff". Can you confirm the correct settings in the IDE for the specified ESP32 E.g RAM, flash SPRAM etc.

[@michaelo8914]

Hi - thx to all your watherstationprojects v1-v3. To learn for myselfe: Why are in V3 ceramic capacitors and not in V2? Do you still have plans for MQTT in V3? Thx & regards from munich

[@impracticalwill2771]

Great project🔥🔥 sir can you add a video to add an. Additional display to this project to view the live weather data without mobile phone

[@CoandaDaniels]

Highly interested in. How ca I get the parts to make the same type of AWS for my home?

[@nl6524]

Awesome 👍 bro 😘

[@opengreenenergy]

Thank You

[@frankbohnen2347]

Hello, why do you use an external temperature sensor and not the BME280 for it? In a factory weather station the temperature sensor is in the housing too. The delta between the two sensors should almost be 0 degree

[@Delali]

This is a really amazing build. I love it. Did you boost the battery voltage to 5v in anyway for the sensors and other peripherals? or you run them all from the battery directly? Also during your test, is the solar panel able to charge the battery sufficiently/to full charge during the day?

[@opengreenenergy]

Thank You. No I have not boosted the battery voltage, rather step down to 3.3V by using a LDO. The solar can't charge the battery fully but it can deliver the amount of charge required for the weather station in deep sleep mode.

[@Delali]

@@opengreenenergy Brilliant. Thanks for the Feedback. Much love. Cheers!!

[@danieltoledo682]

I love this job, congratulations, I would like to know when the integration with Home Assistant or MQTT will be

[@opengreenenergy]

Thank You. Integration with MQTT is now available. You can get the code from the following link github.com/jhughes1010/weather

[@sunildaz]

@@opengreenenergy sir i want the project pcb

[@nmateus]

Can't find more info about the v4. Have you posted already?

[@opengreenenergy]

V4.0 not published yet

[@NareshPatel-nc4wx]

I want to buy weather station full version useful for farming

[@farpointstation]

Thoroughly impressed 👏

[@randyo308]

wow very cool. thanks for sharing cant wait to start.

[@MarkJones-zk1sj]

This is fantastic! Any chance you would like to sell these pre-assembled? I would definitely buy one from you.

[@opengreenenergy]

It will be available on PCBWay baazar soon

[@CraigMullins1]

I wnt to buy as well

[@AtikurRahman-is1ii]

I am also interested to buy one.

[@opengreenenergy]

@@AtikurRahman-is1ii Hi, now you can order the assembled board. Here is the link www.pcbway.com/project/gifts_detail/Solar_Powered_WiFi_Weather_Station_V3_0.html

[@opengreenenergy]

@@CraigMullins1 You can order now, www.pcbway.com/project/gifts_detail/Solar_Powered_WiFi_Weather_Station_V3_0.html

[@p1xelman]

After 3 years, how long did it last? How long did humidity and air corrosion take to destroy the pcb?

[@WojtkoloS]

I ordered full kit station and esp32 is larger and have more pins, than on the motherboard... how i can do now?!

[@kevinwright7931]

I can't figure out what he says about the jumper, he says "There no for the jumper if....". I also can't find the deep sleep library.

[@pimohbusiness]

I hope you can make this wireless and can transmit 433 mhz so it can read to any weather reciever

[@dartfrogdk]

Nice project but why dont you consider to use ESPHOME instead of arduino

[@schranzfreak]

interesting project which I have also made but now I have a few questions about it which are not clear to me through the documentation and also not mentioned in the video: - the deep sleep for the esp board does not work? how can it be activated? - the lux values from the BH1750 sensor are not displayed. how can the value be read out? - the external temperature of the DS18B20 sensor is not displayed. how can the value be read out? thanks for your feedback!

[@javiermitchell7073]

Hi, I would like to build the last version 3.3, when will be the board available on pcbway?

[@opengreenenergy]

You can buy it from my Tindie Store www.tindie.com/products/opengreenergy/solar-powered-wifi-weather-station-v33/

[@goudiemark]

I just got my board delivered a 3.2 from pcbway. It didnt include the esp32, but I already had one laying around. I can flash my esp, but if I put in a charged battery and the esp, it wont turn on. The light doesnt come on the esp board. Looking at the voltage on the 3.3v line its really low, but the battery is around 3.8v and the switch looks good too. Any ideas?

[@karllaun2427]

Nice project!

[@opengreenenergy]

Thank you

[@AnandVishnuPrakash]

Man..it's a wonderful project. How much did it all cost for you..??

[@Sanal3629]

I like very intresting in thip type expiriment. Hoe much expence this equipment

[@toastedavqcado]

Just what I am looking for? I'm in the US and I can't find seem to find the right panel. Could you provide a link to the correct panel for shipping to the US? Thanks so much.

[@primahadhi5175]

hello sir, I want to connect rain gauge sensor with my esp32. my rain gauge sensor using rj11 cable. could you help me? what resistor or components that I have needed and the schematic or PCB circuit sir. thank you 👍

[@opengreenenergy]

Please see the video description and follow my Instruactables or own website. You will get the idea

[@virelfish4689]

Please include Ubidots interfacing in the code

[@vrindavansoni8135]

Happy holi brother

[@opengreenenergy]

Happy Holi Brother

[@Well_Edumacated]

What happens when it rains? Is the pcb water resistant?

[@Diegokun]

Great project! I have ordered the pcd board and i'm trying to find the parts, but i'm having trouble finding that diode. Is there another diode that could serve as replacement?

[@opengreenenergy]

If you are not finding it, you may just leave it. The board will work, diode is used for additional protection.

[@Diegokun]

I am almost finished assembling this project. I have added a ir temp sensor for cloud detection, but i am having trouble finding the 27k resistor and the 1uf ceramic capacitors. Can they be replaced?

[@opengreenenergy]

You can use 0.1uF capacitor and 33K resistor.

[@thomaskrebs1662]

Hi, I would like to change something about the power supply. I would like to supply the Vin Pin with 5 volts, so it would be nice if you published the KiCad files. Can you do this please? Greetings Thomas

[@johnlamport7374]

I am not sure how but I ordered the 3.2 version of this board from PCBway. I know I had clicked on one of your links but I have gone back and checked from this video, your website and the Instructable. I also asked PCBway to check and they replied I did order the V3.2. As far as I can see the only change is the LDO, you've changed it from the MCP1700 to a TC1262. Looking at the spec's for that it's a bit better. Are there any other changes I should be aware of? Thanks

[@builditontutorial]

hi I need help do you need to wear a musk when soldering because of the smoke that comes from it when soildeing

[@jms2005]

Cool video and awesome project. Can you modify your board to be compatible with LTE enabled ESP32 or Arduino? Or can you share CAD file, so this feature can be added?

[@opengreenenergy]

Hi, I can help but I need some time. Loaded with so many scheduled work. Please send me the link for esp32 board.

[@jms2005]

@@opengreenenergy Arduino LTE: store.arduino.cc/usa/mkr-gsm-1400 ESP32 LTE: www.aliexpress.com/item/10000382079248.html ESP32 LORA: www.aliexpress.com/item/1005001776788497.html

[@jms2005]

@@opengreenenergy Is there a way to communicate with you directly? I can support you if it help to speed up the process. I can also share my code for LoRa, LTE, MQTT

[@opengreenenergy]

[e-mail]

[@jms2005]

@@opengreenenergy thank you, I've sent an email to you

[@hunnysoni1517]

Sir what is the approx budget for this project

[@raven_fpv]

Awesome build! I cannot find the UV Index Sensor - GY1145 and the TVS Diode - DT1042-04SO anywhere that can deliver it in 7 days or less. I live in the eastern part of USA. Anyone find any?

[@mohdfikri2689]

i was find the software where we can draw the connection in schematic diagram for full connection like proteus. can u share if u have know other software ? use proteus i can't find some component like tp4056 in library. i can't test my project in proteus software.

[@shivamkapoor7634]

Hey i can't order pcb from pcbway! Is there any way i can make up my own pcb?

[@Saipreetham0]

Can you make water tank automatically filling and cut off circuit using esp8266

[@honeybeezen]

This is a great project! You make it super easy to understand how to build this, including assembling the motherboard. I've never done something like this, but you have encouraged me to try! One question: I want to send my weather reports to a sharing service like Weather Underground. Can I do it with this system?

[@opengreenenergy]

Thank you so much and I am really happy to know that it encourages you to do the project. Yes, you can send the data to wunderground.

[@rodrigalco]

If you make the version 4.0 including air quality sensors, I promise you I build it.

[@opengreenenergy]

Keep in touch. By the way, if you want you can also use BME680 in version 3.0.

[@AbhishekDwivedi-qk7cz]

what is the model no of solar panel used , we need the data sheet for our project

[@siddharthchordiya]

What about a air quality monitor

[@opengreenenergy]

Air quality sensor like BME680 also used in I2C port.

[@pareshchaudhary7168]

Is there a possibility to generate a forecast for the next 5 to 6 days?

[@weijde12123]

If using ThingSpeak, does the weather station count the rainfall when the ESP module is in deepsleep? Or only when ESP is active?

[@exprymer]

Can you explain why we have to hold the BOOT button while uploading the code?

[@andresbellido6846]

Great video!, we are working on a similar project and your video was a great inspiration. Greetings from Bolivia

[@opengreenenergy]

Thank you Glad to know that my vidoe tutorial helpful for you

[@rajendradas2805]

Can the data are shown in mobile any where like use GSM module

[@СергейФилиппов-п3о]

Where are the links to the board and the circuit with radio details.

[@opengreenenergy]

www.pcbway.com/project/shareproject/Solar_Powered_WiFi_Weather_Station_V3_0.html

[@junjunllanan2129]

Will this work with no wifi connection? Thanks!

[@opengreenenergy]

No, see my v4.0 weather station

[@johnmichaels4330]

This would be a great project for my son and I. Thank you very much. Subed and ordering.

[@opengreenenergy]

Glad, you like this project. Thank you for supporting me, I hope your son will definitely like it.

[@s.husain6125]

What is battery backup time sir ??because esp32 dev uses AMS1117 ldo which is power hungary so i thing this is not power efficient pcb. According to me SMD version of esp32 and Efficient LDO like RT9080 will solve this problem with deep sleep

[@opengreenenergy]

You are absolutely correct, I am designing a new pcb without ESP32 dev board. The new pcb will be with onboard ESP32.

[@s.husain6125]

@@opengreenenergy good to know about upcoming project i am aslo working on LORa version of weather station for remote village areas using My DIY 2G Lora gateway and bunch of sensors apart from weather patameters my project also have soil moisture, soil temperature , Soil Salinity , Soil ph sensor which makes it full Agriculture monitoring system also using AI for Data analysis and prediction using Azure iot hub and machine learning using blob storage and realtime database device is in its final stage.. It was not possible without motivation got from your videos ....lots of love ...my device is in final stage and phase of converting my project into startup. ...being phd in Agriculture i master iot and electronic by watching your videos....🙏🤗

[@opengreenenergy]

Glad to hear from you that you have got motivated from my video. Please share your design with me [e-mail]. You already go far away from my design, congratulations 😊🎉

[@pjweds]

Will there be instructions on how to get the info onto Thingspeak

[@opengreenenergy]

The full project is available on Instructables. Link is in the video description.

[@sarathkumar-fk6jb]

Please also add local links for the product...

[@opengreenenergy]

I will update

[@samip537]

Doesn't the PCB get wet inside the enclosure by wind/snow?

[@opengreenenergy]

If heavy rain, then it will be wet. You need to apply a lacquer spray on the PCB for protection. Be sure the sensor is not covered.

[@toastedavqcado]

Will it work without part 12? It is currently unavailable.

[@smartassist9700]

I am ordering items you listed Sir. TP4506 (which one? UsbA or USBc)

[@opengreenenergy]

Both will work, order it as per your charger cable

[@smartassist9700]

You have a battery installed. Is the TP4506 SEPARATE and requires a separate power chord? Any power chord required: Can you list Recommended item that needs power chord then recomended Volts/Amps and connection type for the item needing power chord? (First tech project…so sorry). BUT EXCITED TO ACCOMPLISH IT!.

[@leemandell6471]

I'm curious how the lux sensor is accurate even though it is inside the housing. I was thinking of modifying the top so the sensor can be mounted there like the uv sensor.

[@opengreenenergy]

Lux sensor should be exposed to ambient light. I missed that in enclosure design. You can modify it.

[@weijde12123]

It works fine, maybe not the perfect readings but it gives a lux reading throughout the day. No need to modify.

[@WojtkoloS]

Would you inform, when pre-assembled station will be avaliable?

[@opengreenenergy]

Hi, The whole station will not be available, you have to purchase the sensors separately. Only the assembled PCB with ESP32 module, one BME280 sensor and a solar panel in the kit will be available by 20th April 2021.

[@WojtkoloS]

@@opengreenenergy i guessed that, i will wait. What will be the approximate cost?

[@johnmichaels4330]

@@WojtkoloS $50 US. It's a great deal.

[@brajendrakaurav6442]

Sir ye system aapke pass mil jayega kharidna he

[@reklesboy350]

do you have a code that does Fahrenheit temp?

[@karlaldricherana4551]

Where can ibuy the whole set up

[@opengreenenergy]

You can buy the fully assembled pcb from PCBWAY, the link is given in video description.

[@that70sshow82]

PCBWay is chinese, do they ship to India? Won't it get held at customs?

[@BenjiMcKenzie]

Hello, i´ve got a problem with the assembled pcb, i soldered the ESP32 and flashed it. I plug it on the PCB an put a the battery on it. And turned the swith on. But the LED is off. It doesn´t work :-( If i plug the ESP32 to my PC, i can flash it and use it. Have somebody an idea to fix the problem?

[@opengreenenergy]

Hi, I am extremely sorry. Total 9 boards are assembled wrongly, I think you must be got the faculty one. The problem is in the LDO. You can desolder it and again solder it correctly. All other components are soldered correctly.

[@toastedavqcado]

The links for 17 and 18 are the same.

[@pbshooter100]

Pretty cool. so what is the cost of the PCB that you designed? I don't want to register with PCBway just to find out the cost thanks! edit: never mind, many of the parts in you BOM are unavailable and those that are exceed the cost of the commercial products so there is not point in doing this DIY project if cost savings is the goal.

[@opengreenenergy]

Thank You. 5 USD for 5 PCBs.

[@toastedavqcado]

How do I add additional sensors?

[@mewrongwayKOCXF]

I am sorry but what link is the latest firmware? Thank You

[@lorenz_4273]

The battery link is broken

[@freakzposse]

dosent work, the mcp 1700 is getting hot and the esp32 get no 3.3v,....

[@mrajdj09]

How much it cost??

[@rahulkamboj9375]

Hi sir , i want to buy your project , can you sell ????