this is how I send data with my SIM7600

AT+HTTPINIT OK AT+HTTPPARA="CONTENT","application/x-www-form-urlencoded" OK AT+HTTPPARA="URL","https://api.thingspeak.com/update?api_key=xxxxxxxxxxxxxxxx&field1=5.00&field2=25.00&field3=50.00" OK AT+HTTPACTION=0 OK

+HTTPACTION: 0,200,6 AT+HTTPTERM

OK

I have one question. How did you connect your Arduino to the SIM module? My Arduino MEGA have a 5V UART and my sim7600 3.3V I use logic level converter by as I cannot decrease the speed of the SIM7600 below 115200 permanently I cannot communicate properly through the UART with AT command…. Thanks for your feedback and advise