I'm using the We are using a ESP32-S3-DEVKITC-1-N8 with the uart connected to a SIM7600E. I can see the TX from the ESP on the RXD of the SIM7600, but we see a signal on the ESP RX as follow: The min is 2.84V.
I'm using Arduino IDE 1.8.19 with the following code for sending an AT command:
Code: Select all
HardwareSerial Sender(2);
void setup() {
Sender.begin(115200 , SERIAL_8N1, 44, 43);
}
void loop() {
Sender.write("AT");
.
.
.}
Thank you in advance for any help.