Gooday,
I am trying to interface the 5G HAT module with the XIAO ESP32C3 module through the UART and also through the USB to TTL, but both are unsuccessful.
Has anyone tried this method? Or is there a different method that can be used?
Below is the 5G HAT that i am using 
https://www.waveshare.com/wiki/RM500Q-GL_5G_HAT.
Appreciate if anyone can help on this
shabaz , I am trying to communicate through the UART from the ESP32C3 directly with the UART pin on the 40 way connector. But somehow it got stuck here.
And the code that i am using is
#include <HardwareSerial.h>
#include <ArduinoJson.h>
HardwareSerial mySerial(1);
// Using UART1
const int RX_PIN = 9;
// Replace with actual RX pin number connected to 5G module
const int TX_PIN = 10;
// Replace with actual TX pin number connected to 5G module
void setup() {
Serial.begin(9600);
// Initialize serial communication for debugging ni optional
mySerial.begin(9600, SERIAL_8N1, RX_PIN, TX_PIN);
// Initialize UART1 for 5G module communication
Serial.println("Initializing 5G module...");
mySerial.write("AT\r\n");
// Check response from 5G module
while (mySerial.available()) {
char c = mySerial.read();
Serial.println(c);
}
void loop() {
}
And i have checked the D5 function. I noticed there is a onboard switch for it. I tested this code while putting the switch in the ON state as well as in the OFF state. The result are the same for both.
Hi balajivan1995 . Thanks for the info. I dont have the CP2102 is in hand. But i tried using this USB to UART controller as in the image below. But it was unsuccessful either.
balajivan1995 , i connected the ESP32 with the TTL and can view the data that i am sending from from the ESP32. As shown in the image below
i used the hterm and i get this result
Does this looks good?