use the esp32 board so that you can have alerts sent to your phone via wifi or bluetooth
@michaelmitchell85673 жыл бұрын
Thanks for that! Epic! Saving up for some components!
@lidya7512 Жыл бұрын
Hello, I have a project using this sensor, but first I need to know how many bits this sensor has and how to display the output voltage that interprets the concentration of CO2? Could you help me with this?
@benderrodriguez3765 Жыл бұрын
www.google.com/url?sa=t&source=web&rct=j&url=www.winsen-sensor.com/d/files/infrared-gas-sensor/mh-z19b-co2-ver1_0.pdf&ved=2ahUKEwj5_KvHxqj9AhWF7LsIHbPeCesQFnoECD0QAQ&usg=AOvVaw0QjXBHfO3GFR1wZalirsSt The Sensor Output is UART and PWM.
@benderrodriguez3765 Жыл бұрын
The Sensor has no Voltage Output. The Output Signal is UART and PWM.
@lidya7512 Жыл бұрын
@@benderrodriguez3765 but it has a Vo pin that I read in the datasheet to read the voltage output
@benderrodriguez3765 Жыл бұрын
@@lidya7512 in my project I only used uart
@ThorstenDeuter4 жыл бұрын
Nice project! I like the way you put the sensor in the corner to have both sensor windows open to the outside
@kshitizprakash98415 жыл бұрын
will you please send me library and code because its showing error again and again
@ricado35894 жыл бұрын
Hallo Herr Krause, ich bin am Verzweifeln. Der CO2-Sensor gibt keine Werte raus. Zunächst habe ich die CO2-Meter.ino probiert, doch da erscheinen auf dem Bildschirm keine Werte. Dann habe ich den CO2-Sensor alleine mit der MHZ19_getppm.ino aus den Examples probiert und mir die Werte über den Seriellen Monitor anzeigen lassen. Da kommt immer nur: "MH-Z19 now warming up... status:error: can't get MH-Z19 response. -1" Wenn ich mir die MHZ19_uart.cpp anschaue, finde ich zwar den Ausdruck, aber ich verstehe nicht warum. Irgendwas wird hochgezählt und mit 100 verglichen. Viele ifs und whiles. Viel Zeug, was man für den Gebrauch im Arduino Nano nicht braucht...(Bin kein gelernter Programmierer) Wenn ich den Sensor an den Raspberry 4 hänge, kommen plausible Werte. Hab ihn also beim Löten nicht zerstört. Auch, wenn ich den PWM-Ausgang mit Arduino nutze, kommen plausible Werte. Ich habe einen Clone und ein Original Nano. Beide haben das gleiche Problem. Haben Sie vielleicht eine Idee?
@StinkFish994 жыл бұрын
Dann ist der Sensor womöglich falsch angeschlossen. TX und RX müssen über Kreuz vertauscht werden. Versuchen Sie nicht den Sensor über PWM einzulesen. Das hat bei mir damals schon nicht geklappt.
@ricado35894 жыл бұрын
@@StinkFish99 Vielen Dank, das war der Fehler.
@trezvinik4 жыл бұрын
@@StinkFish99 after 2 month of manipulation I found answer! Thank you all working! @Ri Cado thanks for question!
@crazyethanyeahyeah Жыл бұрын
Great video and project ... I was hoping to build something similar to sense co2 in mushroom growing tubs once level reach fan turns on.
@mikenr Жыл бұрын
Me too! Do you know what range of CO2 most mushrooms need to be kept below? It appears the sensors are sold in different ranges 🙂
@AntonioSovrano-zg9ek11 ай бұрын
Very nice project, but if there is not the wiring diagram......what can we do without it?
@agusartawan63474 ай бұрын
wkwkwkwkw😂
@aykuttopdemir27353 жыл бұрын
I used mh-z19 not mh-z19b. It is not measuring the value with it. I connected it 5 and 3.3 volt pin outs of arduino uno. But the result is same. What can i do for to measure CO2 with mh-z19.
@StinkFish993 жыл бұрын
RX and TX must be cross-connected to the Arduino RX TX. So RX connected to TX and so on.
@StinkFish993 жыл бұрын
Wait 60 seconds for the first Value
@aykuttopdemir27353 жыл бұрын
@@StinkFish99 Thank you, it worked! You are so helpful, Great work. I wish you to do different projects in the future and share them with us.
@StinkFish993 жыл бұрын
@@aykuttopdemir2735 mny thx👍😁
@rat74645 жыл бұрын
Can I set up an alarm with this I’m designing a small submarine for research and can you recomend a Oxygen Sensor so i know when my airs almost out thank you
@StinkFish995 жыл бұрын
Alarms are defined in the sketch
@yoshcatube4 жыл бұрын
Do you have any assembled Co2 meters, trouble locating parts.
@StinkFish994 жыл бұрын
I only have one prototype
@uengel57554 жыл бұрын
Hallo Jörg ich habe noch eine Frage zur Kalibrierung des Sensors. Was muss ich dabei beachten? Ich habe im sketch gesehen, dass du einige Befehlszeilen (auch zur Kalibrierung) auskommentiert hast. Wie beginne ich am Besten? Gruß Ulli
@StinkFish994 жыл бұрын
Der Sensor läuft auf Dauer am besten wenn die Autokalibrierung aus ist. Er muss auch sonst nicht kalibriert werden.. Das Gerät sollte im Freien zwischen 350 und 450ppm anzeigen. Dann ist alles normal.
@Duhhx15 жыл бұрын
Looking to build a greenhouse co2 monitor for plants, do you think the mhz19 a reliable sensor?
@StinkFish995 жыл бұрын
The sensor has been running for 6 months now. In the time there were no problems.
@DrMouhamadouAMAR3 жыл бұрын
Thanks, Joerg for this beautiful work. Can you tell me please what is the value at the top right of the screen? Thanks
@StinkFish993 жыл бұрын
That is the dimming factor. The display is adapted to the ambient brightness in 10 levels.
@DrMouhamadouAMAR3 жыл бұрын
@@StinkFish99 Well, Thanks
@DrMouhamadouAMAR3 жыл бұрын
@@StinkFish99 I have some additional question if I may ask : 1. There are a yellow wire on the brightness detector. Can you tel me on what pin it is connected on te brightness detector also on the arduino ? Thanks in advance.
@StinkFish993 жыл бұрын
@@DrMouhamadouAMAR The yellow wire goes to A0 on the Arduino.
@DrMouhamadouAMAR3 жыл бұрын
@@StinkFish99 thanks. And on the brightness sensor itself. Where is it welded?
@michelfrance756 жыл бұрын
I am surprised that the project works correctly with the wiring shown because the sensor has a logic in 3v3 and the Arduino Nano a logic in 5V. The sensor Rx and Tx pins can not be connected directly to the Nano board pins D4 and D3. Check but the CO2 ppm are probably bad, you must have checksum errors (see Winsen data sheet for the software routine). Do you have checked the consistency of these values with those provided by the PWM output ?
@StinkFish996 жыл бұрын
Be surprised. The Arduino code is public. Build it. It works exactly as shown in the video.
@StinkFish996 жыл бұрын
But here are a few hints. The light sensor is actually a digital sensor that can only go on or off. Notice the yellow wire, I take an analogue light value directly from the circuit. The speaker has a tendency to self-oscillate. Therefore, the transistor is disabled and bypassed.
@michelfrance756 жыл бұрын
Let's say that the software uses numbers but what exactly do they represent ? The manufacturer's specification states in §4 and at the bottom of §7 that the UART measurement is "TTL interface level 3.3 V". So the direct connection with the Arduino board which operates in 5V not only risks to deteriorate the sensor (entry Rx in particular which receives 5V instead of 3V3) but also to provide erroneous values. Indeed, the logical HIGH level of an Arduino input is theoretically from 3V, which leaves too little margin with the theoretical 3V3 provided by the sensor. Better to implement a small 2-way bi-directional level adapter 3V3/5V. Your code should also use the "CO2status" parameter of the getPPM() routine. This is worth -1 in case of checksum error and in this case it is necessary to invalidate the measurement. I also did not find in the used library where the 9600 baud initialization of the serial connection with the sensor was implemented, again required by the Winsen specification. I also recommend using the PWM output which gives more stable results than the UART and do an inter correlation treatment with both measurements. In activated auto calibration mode, do not forget also that the sensor must be placed in an environment with 400 ppm of CO2 at least 20 minutes per 24 hours or else erroneous measurements will be made. For my part I recommend to disable the ABC mode before the first 24h of use of the sensor to keep the factory settings.
@StinkFish996 жыл бұрын
I use a Netatmo weather station to get CO2 benchmarks. The values of my CO2 meter are slightly smaller than the values of the Netatmo measurement. Overall, my CO2 meter works reliably and accurately. I see no reason to change the hardware.
@michelfrance756 жыл бұрын
Nobody forces you to change anything, you are free to do as you wish ! Nevertheless it seems to me useful that those who read us know that the sensor is not correctly connected. This is a common 3v3 / 5v level adaptation issue for which there are dedicated circuits to 2 € ! But do not pretend that your system works reliably and accurately because it is inexact. I tested your wiring with an UART read routine more developed and I got more than 80% checksum errors, although the sensor provides a plausible value, but in excess of the uncertainty announced with the concomitant reading of the PWM pin (always smaller). Good luck in your projects.
6 жыл бұрын
Can the co2 meter be measured in the pressurized water container or in the discharge section?
@StinkFish996 жыл бұрын
The data sheet says nothing. But I suspect that the sensor only works properly at normal pressure.
@gordonramzesss14773 жыл бұрын
Hello joerg, thanks for your great work! I just learn about MH-Z19B using arduino mega 2560. And i read datasheet, but i still confuse about the callibration. I put this sensor in outdoor but it read 1200 ppm. Do u know how to callibrate this sensor? Thanks
@StinkFish993 жыл бұрын
hello, you can try to let the sensor work outdoors for an hour. Then it should gradually get below 500ppm. Normal is something around 430ppm outdoors.
@gordonramzesss14773 жыл бұрын
@@StinkFish99 thanks! i will try it
@uengel57554 жыл бұрын
Hallo Jörg, nun sind alle bestellten Teile eingetroffen und ich teste nun. dazu habe ich zwei Fragen: 1.Sensor-Test: Nach dem Start/Warmup steht der Sensor auf 400 PPM. Nun hauche ich den Sensor an. Der Sensor scheint sehr verzögert zu arbeiten. Beim "Hauch-Test" steigen die Werte am Display erst sehr verzögert. Ist das normal? Eigentlich sollte sich doch auch der TEMP-Wert beim Hauchen erhöhen. Passiert aber nicht?! 2.Buzzer-Test: Ich habe den Buzzer mit GND und D2 am Nano verbunden. Leider bleibt der erwartete Ton bei CO2>1.500 PM aus. Habe ich ihn falsch angeschlossen? Danke und Gruß
@StinkFish994 жыл бұрын
Nach dem Einschalten braucht der Sensor noch 60 Sekunden bis er die ersten Daten ausgibt. Ab dann wird alle 5 Sekunden ein Datensatz ausgegeben. Die Temperatur wird im Sensor gemessen. Durch einfaches anhauchen wird sie nicht so schnell steigen. Bei dem Buzzer muss der Lautsprecher direkt an Masse und dem D2 Pin angelötet werden. Also ohne Stromversorgung und den Transistor vor dem Lautsprecher. Viel Erfolg. Und melden Sie sich mal ob am Ende alles funktioniert hat.
@uengel57554 жыл бұрын
@@StinkFish99 Vielen Dank für die sehr schnelle Antwort. - Der Buzzer funktioniert nun wie im sketch. - Wenn ich den Finger etwas länger auf dem Sensorgehäuse platziere, steigt dann auch die Temperatur. Zeitverzögert. - CO2-Werte steigen nach dem Hauchen etwa nach 10-15 Sek an. Zeitverzögert. Ich hatte vor Einsatz des MH-Z19b nur mit einem MQ-135 gearbeitet. Der war deutlich reaktionsschneller. Deshalb fällt es mir auch so auf. Das zeigte sich auch darin, dass schon kleine PPM-Änderungen am Display angezeigt werden.
@StinkFish994 жыл бұрын
@@uengel5755 Der MH-Z19b ist aber sicher der bessere Sensor. Er gibt die Daten auch schon verarbeitet aus man muss sie nur noch anzeigen. Aber schön das Ihre Schaltung jetzt funktioniert. Gratuliere zum Erfolg!
@uengel57554 жыл бұрын
Ich betreibe den SSD1331 an 5V. Bei mir wird der Teil vor der Anzeige sehr heiß. Ist das normal bei diesem SSD? Der monochrome SSD1306 bleibt kalt.
@StinkFish994 жыл бұрын
@@uengel5755 Also bei mir läuft das Display mit 5V und bleibt kalt. Aber laut Datenblatt soll das Display auch mit 3.3V laufen. Versuchen Sie es einfach. Der 3.3V Pin ist noch frei am Arduino. Womöglich wird das Display damit nicht so heiß.
@kittyvlekkie4 жыл бұрын
Hello Jeorg, How would i wire this setup, this is my first arduino project and would love to carry it out
@akashsambare80464 жыл бұрын
Hey, I am working on this project, Can you help me, I have one problem. My co2 sensor shows 450 after after sometime 4000, how to calibrate it properly, or how to use it, please help me. I have same MH-Z19b sensor and Using Esp32 Ttgo Sim module
@StinkFish994 жыл бұрын
Test the sensor outdoors for 10 minutes. A constant value below 450 ppm should be displayed there. Otherwise the sensor could be defective.
@marxista_medroso6 жыл бұрын
Hey Guy!!! congratulations !!!Your video is so cool man!!! Your channel have a future!
@StinkFish996 жыл бұрын
THX Man :-)
@kawaii.kawaiian5 жыл бұрын
Hello, thank you for this vid, but i have some few questions. 1. can this sensor reach readings 5000ppm? we plan to use your device to measure co2 when burning coals. is the sensor not enough for that? 2. since our budget is very limited, is it possible to read the data from the computer instead from the mini oled? thank you for your reply in advance! :)
@StinkFish995 жыл бұрын
Hello, the data sheet indicates the Sensor range of 0-5000 ppm. If you use an ESP8266 with WIFI instead of an Arduino it is certainly possible to transfer the data to a network. But you still need a suitable PC software.
@kawaii.kawaiian5 жыл бұрын
@@StinkFish99 thank you so much
@zyghom3 жыл бұрын
I have the same CO2 sensor and my finding is: autocalibration makes sense ONLY if you have in every 24h proper reference to 400ppm i.e. you take it out of the window. Otherwise it will start showing blabla after some time
@StinkFish993 жыл бұрын
Yes you are right. The suto calibration is a little inconvenient.
@dajoo40144 жыл бұрын
Heyho, does it work with the esp32?
@StinkFish994 жыл бұрын
I haven't tried that
@PANCHOxLOCO4 жыл бұрын
Hi, how are you? I hope it's okay. Your project is myt but very good and that is why I wanted to ask you if you could help me make a monitor and co2 control. The purpose of this is to be able to control the co2 injection and the extraxxion of the co2 excess by means of 2 relays.
@dannyiskandar4 жыл бұрын
thank you for posting this, so this is about $50 all in, is there a away to make it cheaper? also what is your recommendation for 3 d printer?
@grummhd30204 жыл бұрын
Use a different box, an esp8266 thingspeak and no display.
@ledgrowlabs4424 жыл бұрын
Teach me what I buy for it to work straight out in one order
@jhakoning32705 жыл бұрын
Very nice project. I will build it. Is there a wiring diagram?
@StinkFish995 жыл бұрын
sry, i have no wiring diagram.
@parkjaeil70305 жыл бұрын
I would like to link to the library Adafruit_SSD1331.h ,MHZ19_uart.h
@uengel57554 жыл бұрын
Hallo Jörg, nachdem mein Nachbau deines Projektes nun sehr gut funktioniert, habe ich noch eine "Light-Version" mit einem LCD gebaut. Gerne würde ich dir diese Version (Aufbau, Wiring, Sketch) einmal zeigen mit der Bitte, mal drüber zu schauen. Mich wundert, dass ich nach 2x Hauchen erst ca. 20 Sek warten muss, bis dann die Werte von 400 PPM auf über 1000 PPM steigen und dann wieder abfallen. Also sehr verzögert. Gibt es eine Möglichkeit, dass ich dir die Dateien mailen kann? Viele Grüße Ulli
@StinkFish994 жыл бұрын
Ja, gerne würde ich mir die Sachen mal ansehen. Allerdings möchte ich hier nicht öffentlich meine Mailadresse einstellen. Habe jetzt schon genug Spam jeden Tag. Der Sensor verarbeitet die Daten intern bevor er etwas ausgibt. Man weiß eben nicht was da genau abläuft. Ich habe manchmal den Eindruck das die Daten schon intern gemittelt werden bevor sie raus gehen. Viele Grüße .
@YADA700735 жыл бұрын
Great job brother...Can this sensor MH-Z19b working fine with Mushroom Project to check CO2?
@StinkFish995 жыл бұрын
Wy not?
@anandvenugopal7755 жыл бұрын
can you pls give me the "mhz19_uart.h" library?
@StinkFish995 жыл бұрын
I uploaded the Library. Click the Github Link above.
@anandvenugopal7755 жыл бұрын
@@StinkFish99 thank you so much sir! 😊
@paplozirkel6325 жыл бұрын
Hallo Joerg, ich finde dein Projekt super und habe mir deshalb alle Teile in den Links bestellt. Nun bin ich dabei den Code auf den Uno hochzuladen, verdrahtet ist schon alles. Nun zu meiner Frage, ich habe die Bibliotheken von Github bei Arduino eingebunden. ,Hz19_uaet wird mir als rot angezeigt, scheint aber kein weiteres Problem zu verursachen. Beim Hochladen bekomme ich die folgende Fehlermeldung, no matching function for call to 'Adafruit_SSD1331::writePixel(unsignet int)'. Wenn man die Letzen Zeilen des Sketches entfernt, lässt es sich hochladen, also scheint nur dort das Problem zu liegen. Ich hoffe du kannst mir weiterhelfen. LG
@StinkFish995 жыл бұрын
Hallo, ich habe es mir angesehen. Die Adafruit1331 Bibliothek war inzwischen veraltet. Ich habe die neue Bibliothek und meinem angepassten Sketch bei Github zum Download eingestellt. Du musst unbedingt vor der Neuinstallation die veraltete Bibliothek komplett entfernen. Sonst kann es beim kompilieren zu Konflikten kommen.
@paplozirkel6325 жыл бұрын
Super vielen Dank für die schnelle Antwort, du hast einen besseren Kundenservice als die meisten online Läden👍
@StinkFish995 жыл бұрын
@@paplozirkel632 Mich würde interessieren ob es jetzt funktioniert? Gib mal bescheit.
@ramyisaac83696 жыл бұрын
very nice , herr krause . if u can make sensor working on phone alerts that will be gr8 ^^
@StinkFish996 жыл бұрын
The device has neither wifi nor bluetooth. it is not possible to send notifications. It would be necessary to build a new one based on a nodemcu8266
@ramyisaac83696 жыл бұрын
@@StinkFish99 thanks for replay herr krause :) wish to you the best :)
@uengel57554 жыл бұрын
Hallo Joerg, tolles Projekt. Würde ich gerne nachbauen. ich habe zwei Fragen: - Wo finde ich einen Wiring-Plan? Ich bin Anfänger. - Wo bekomme ich das tolle Gehäuse her? Ich habe keinen 3d-Printer. Vielen Dank für Deine Arbeit.
@StinkFish994 жыл бұрын
Hallo, ich habe keinen Verdrahtungsplan gemacht. Vieles ergibt sich von selbst anhand von dem Sketch. Die STL Files für das Gehäuse sind auf der Github Seite zum Download. Wenn man selbst keinen 3D Drucker hat kann man sich damit an Auftragsdruckereien im Internet wenden. Beste Grüße.
@uengel57554 жыл бұрын
@@StinkFish99 Ich habe mal versucht, das Wiring aus dem Sketch zu suchen: CO²-Sensor MH-Z19b BUZZER Hell-Sensor OLED SSD1331 VCC->5V Vin -> 5V VCC-> ??? VCC-> 5V GND->GND GND->GND GND-> GND GND -> GND rx -> 3 I/O->2 ??? -> A0 SCLK-> 13 tx -> 4 MOSI -> 11 CS -> 10 RST-> 9 DC -> 8 Ist es so richtig? Was ich nicht verstehe, ist die Verdrahtung des Helligkeits-Sensors.
@StinkFish994 жыл бұрын
@@uengel5755 Hallo, alle Komponenten müssen mit 5 Volt und GND verbunden werden der CO2 Sensor rx ist an D3 und tx ist an D4. Im Grunde ist alles im Sketch ersichtlich. Am Anfang von dem Video wird die Verdrahtung gut gezeigt. Der Helligkeitssensor ist eingentlich digital und zeigt nur hell oder dunkel an. Achten sie in dem Video auf den gelben Draht. Den habe ich da mitten auf der Platine angelötet um einen analogen Wert abzugreifen. Dieser Draht wird mit A0 verbunden. Ist im Sketch auch kommentiert. Viel Erfolg J. Krause
@uengel57554 жыл бұрын
@@StinkFish99 Ich warte jetz auf den Sensor, den ich bestellt habe. Sketch lässt sich fehlerfrei kompilieren. 1.Schritt sieht gut aus. Kennst du jemanden, der dieses gehäuse drucken könnte? Natürlich nicht kostenlos, klar.
@StinkFish994 жыл бұрын
@@uengel5755 Einfach mal bei Google 3D Druckerei suchen. Da sind Anbieter ohne Ende
@Krzeszny954 жыл бұрын
Can you link the 3D casing model?
@StinkFish994 жыл бұрын
The stl files are already available for download.
@Krzeszny954 жыл бұрын
@@StinkFish99 I didn't notice they were included in the GitHub link.
@drstickerz5 жыл бұрын
Your video is very inspirational! I am currently setting up MH-Z19 on my raspberry pi 3, but my sensor readings does not start from 400ppm and start from around 800ppm instead. It remains in the range of 800-900ppm... I suspect that I need to do some sort of compensation or calibration. Do you have any advice for this?
@StinkFish995 жыл бұрын
Test the sensor outdoors. There he should fall below 400ppm within a few minutes.
@FOATE4 жыл бұрын
Cool project, nice music. Whats the name of the track?
@StinkFish994 жыл бұрын
The music is included in the Pinnacle video editing software.
@FOATE4 жыл бұрын
@@StinkFish99 Oh really? I like it ;) Thx for sharing this video, just ordered one of those MHZ sensors. Very curious to see what would happen if I hang this in my greenhouse and turn the ventilation off. Thx again for sharing this awesome project :)
@timothyhaycraft28074 жыл бұрын
I know this is slightly off topic but would this project have the ability to be used to monitor co2 saturation in an open water closed circuit rebreather encased in liquid lucite that after curing would form an impermeable waterproof block essentially shielding it from the of caustic saltwater if so it would make a perfect dive rig data logger
@kshitizprakash98415 жыл бұрын
will you please provide me Display SSd1331 library??
@StinkFish995 жыл бұрын
I uploaded the Library. Click the Github Link.
@echo-_-radio5 жыл бұрын
i love this what a fantastic idea stayy safe ! ;)
@ДженДжен-д3м3 жыл бұрын
Здравствуйте, проект супер. Можете показать схему подключения, хочу сделать себе такой же.
@StinkFish993 жыл бұрын
I don't have a schematic. But at the beginning of the video you can see how everything is connected.
@oussamafr61235 жыл бұрын
How you made the frame
@StinkFish995 жыл бұрын
I do not understand the question. What do you mean by frame?
@oussamafr61235 жыл бұрын
@@StinkFish99 i mean packaging of this project
@oussamafr61235 жыл бұрын
@@StinkFish99 please I want an answer
@StinkFish995 жыл бұрын
@@oussamafr6123 I still do not understand your question. Do you mean the case?
@oussamafr61235 жыл бұрын
@@StinkFish99 yeh the case or the box
@christophervastag85665 жыл бұрын
Können sie mir einen Anschlussplan beschreiben?
@StinkFish995 жыл бұрын
Ich habe keinen Anschlussplan. Die Belegung ergibt sich aber aus der Pin Belegung im Arduino Sketch
@christophervastag85665 жыл бұрын
Habe den buzzer an d2 und ground. Es kommt aber kein Ton. Ist d2 richtig?
@joachymwubber21346 жыл бұрын
Closed source ?
@StinkFish996 жыл бұрын
Components & Code below
@uengel57554 жыл бұрын
Hello everybody, I´m looking for someone who can print this case for me. I have no 3D-printer.
@familielutzenburger27044 жыл бұрын
Are you served? I could print one for you, where do you live (postal fees could be expensive)?
@uengel57554 жыл бұрын
@@familielutzenburger2704 Danke für das Angebot. Ich habe ein Gehäuse hier in Berlin bei einem privaten Anbieter drucken lassen. Wenn alle Teile zum Projekt angekommen sind, werde ich das testen.
@doctorweile5 жыл бұрын
Have any of you ESP32-users had any luck, getting values through the UART? I use pin 16/17, RX->TX / TX->RX (NodeMCU-32S) and Serial2.begin(9600, SERIAL_8N1, 16, 17) works fine, having just tested it with a GSM900. PMW works, but I seek the UART-value.
@stefan.ziegler4 жыл бұрын
Hier eine CO2-Ampel, die Ihrem Character gleichkommt und noch einige nette Zusatzfeatures bietet: www.virtenio.com/de/produkte/co2-ampel/