I am pretty new to Arduino and decided to make a small IoT project using the Seeduino Xiao as the base microcontroller for my project.
Problem is, I need Wifi connection.
Enter ESP8266-01.
I am having real trouble getting the Xiao to communicate with the ESP8266-01.
Having tested that the ESP8266-01 is functional with AT firmware --> could get a response to ‘AT’ through the serial monitor at baud 115200 when connect with my Arduino Uno.
Have tested the following set up: Seeduino Xiao----ESP
3.3v-----------------------vcc
3.3v----------------------CH_EN
gnd-----------------------gnd
RX------------------------RX
TX------------------------TX
This worked with the Uno and gave the ‘OK’ response to the ‘AT’ command.
Also tried with the RX and TX wires switched but no response.
Is there a problem with connecting the Xiao to the ESP8266, or am I doing something wrong?
The only difference between XIAO and UNO is the different power supply level, XIAO is 3.3V and UNO is 5V.Please confirm that ESP8266-01 can work at 3.3V.
Thanks for the response.
The ESP8266-01 only works with 3.3V- I used the 3.3V supply from the Uno to connect the ESP.
ESP8266-01 can also pull quite a lot of current (200-300mA) so I also tried it with an extra breadboard power module with a 3.3V output to power the ESP, in case it was a stability issue from higher current draw through the Xiao.
Sadly, still did not work.
Is there a way to turn the Xiao into a ‘dumb’ USB to ttl?
On the Uno this is done by grounding the reset pin, which then allows direct communication to the ESP via the serial monitor.
