Hi, I am trying to connect ESP8266 to Arduino UNO
- For the pin connections, using following
ESP8266 pins
- VCC, GPIO0, GPIO2, RESET, CH_PD - Connect to VCC (3.3 V) through external battery
- Rx - Connect to Tx of Arduino using voltage divider so that high from Tx(Arduino) is seen as 3.3V at Rx(ESP8266)
- Tx - Connect to Rx of Arduino
- Gnd - Connect to Gnd of external battery
- Make Arduino Gnd connect to the Gnd of external battery as well to have same reference.
Uploaded empty sketch in Arduino UNO - so that it behaves as simple UART.
When I switch on the ckt, ESP8266 shows RED LED i.e. it gets powered on. Bluw LED on it blinks for a while indicating "Initializing".
Using TeraTerm, I connect to the serial port (for Arduino connected). Setting terminal Rx and Tx as LF+RF and Local Echo. Tried different baud rates as 57600, 9600 and 115200.
But no response from ESP8266 for AT commands. (AT, AT+RST, AT+GMR).
Kindly help me.