ESP_Sprite wrote: ↑

Thu Jan 06, 2022 1:58 am

Where do you read that? Directly from the C3 datasheet:
c3uart.png

Yes i can read that too, but i dont see the pins. Can you please tell me where are the 2nd uart pins are defined because i literally cant find them. Thanks.

Use UART1 (= Serial1) for your barcode reader, UART0 (= Serial) is for UART/USB chip through GPIOs 20 and 21 on DEVKIT Board Serial1.begin(9600, SERIAL_8N1, 19,18); This didn't work. Same results. here is the code: void setup() { // Open serial communications and wait for port to open: Serial.begin...

Looks like your issue is that you use the serial port both for your computer connection as well as the barcode reader indeed. The ESP32C3 has two serial ports, though, so you can move your barcode reader to the other one. From the C3 datasheet, it has only 1 uart? In that case what should i do. Tha...

**Hardware:** Esp32C3: https://jacobstoner.com/ESP32-C3/esp32-c3_datasheet_en.pdf https://jacobstoner.com/ESP32-C3/esp-c3-13-kit-v1.0_specification.pdf **Barcode sensor:** https://cdn.sparkfun.com/assets/b/5/0/e/e/DY_Scan_Setting_Manual-DE2120___19.4.6___.pdf **Connection:** **Esp32C3 == BarcodeSen...