if module have TTL RX TX then | Microcontroller › 8051 › interfacing › if module have TTL RX TX then October 21, 2015 at 7:28 am #13404 Rahul TungarParticipant if module have TTL RX TX then connect Rx of module to Tx of your controller and Tx of Module to Rx of your controller… if you can plz post your module no or Pic
