EC200U-CN EVM board to Ardinuo Uno communication using UART

Technical Subjects Open Solution
1

Problem STATEMENT:

Using QCOM or QNavigator I can able to test various AT command sequences: everything works fine. now i want to sent the AT command from Ardinuo MEGA2560 to EC200U-CN evm board through UART .
connected like below:
ardinuo ec200u-cn evm board
Tx (0)-------- Rx COM1( MAIN )
Rx (0)-------- Tx COM1( MAIN )
gnd -------- gnd

is this UART communication will work between this two boards? kindly give your suggestion.

if anyone worked before like this please share the example code.

2

You should not connect UART to RS-232.
You either need to expose the modem’s UART pins on EVB or convert Arduino’s UART to RS-232.

1 Like
3

thanks for the your reply.
now i am using the TTL converter to convert UART to RS -232 , then the RS232 logic levels i am connecting the EVM board COM1 main connector.