Blynk Solartracker

[PeteKnight]

I don’t really understand any of your responses to the issues I pointed out earlier. If you want assistance then you need to verbalise your questions better.

@Ajinkya

#include <SoftwareSerial.h>
SoftwareSerial SerialAT(3, 1); // RX, TX

#define SerialMon Serial
#define SerialAT Serial1

This makes no sense at all.

Pins 1 and 3 are the UART0 pins that are also connected to to the USB port (via a TTL to USB chip). You’re attempting to use them to also communicate with your SIM800.

The ESP32 also has two other hardware UARTs, so there is no need to use software serial to create a software UART.

You’ve already read this article, because you liked it yesterday, but you clearly haven’t understood it…

Understanding hardware and software serial ports

I’m still seeing frequent posts, mostly from new members of the forum, who are confused about how to add WiFi or Bluetooth connectivity to devices like the Arduino Uno, Nano or Mega, or from people who are trying to use serial communication with some other type of peripheral. I thought I’d try to put together some guidance on how to do this properly. First things first though – if you’re using a device such as an Uno, Nano or Mega that doesn’t have built-in internet connectivity then you shoul…

Pete.