Hello, I’m trying to send data from Arduino Mega to a Wemos D1 ESP8266 board, could you please help? Something is wrong with the code but I can’t figure out what. //Transmitter code #include <ArduinoJson.h> #include <SoftwareSerial.h> #define SAMPLES 20 //Number of samples you want to take everyt…

Need to get the Passthough running first so put aside the json code for now and try to get the simple passthrough sketches running in both directions

Can you post a photo of your voltage divider that you are using for Mega TX to ESP RX?

sure one second this is the result I'm getting [image]

A bit hard to read, can you post the text from the both monitors

for Mega 18:13:17.965 -> 104 10 9 8 7 6 5 4 3 2 1 18:13:22.953 -> MegaToESP8266 Setup finished. 18:13:22.987 -> Set IDE monitor to Newline or Both NL & CR 18:13:27.136 -> hi 18:13:33.053 -> hello 18:13:39.822 -> hi mega 18:13:46.007 -> hi esp for esp 18:13:19.689 -> 5 4 3 2 1 18:13:22.207 -> ES…

ok still no good. do you have the photo the divider?

I only put one resistor of 51ohm [image]

try putting in the voltage divider circuit I posted earlier OR a diode like I have in my circuit above

voltage divider in place [image]

Ok try the passthough sketches again

Arduino mega to esp8266 communication via TX RX

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jelka_bisa May 6, 2021, 7:08pm 67

all good, displayed on the web. It is a bit lagging behind but it is working.

Thank you so much!

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Arduino mega to esp8266 communication via TX RX

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