In SX Microcontrollers, SX/B Compiler and SX-Key Tool, peterverkaik wrote:

check your connections!

sx28 GND to PC comport pin 5.

sx28 tx to MAX232 TTL input. Corresponding MAX232 RS232 output to PC comport pin 2.

sx28 rx to MAX232 TTL output. Corresponding MAX232 RS232 input to PC comport pin 3.

Set PC terminal program to 8 databits, no parity, 1 start, 1 stop, no handshake

(no handshake is eminent for the PC to transmit data)

 

Since you cannot receive data in the SX from the PC, the handshake may not be set to none!

 

regards peter

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