Heltec V3 433MHz - Simple Serial

Hi,

New member here but dabble with meshtastic for a couple of years.

I have a slightly different project that needs wireless serial link. I do RC car racing at a local club and doing a LED leader board. I am reading the sertial data from the laptop using a raspberry pico but want to make wireless and keep as uart based.

I am trying to get serial simple mode to work on a pair of heltec V3 433.

I am using iphone/ipad app to set up the radios at each end. I have enables serial mode, set to simple, set to 9600, set time out to 1 sec, and have matching channels called serial. I have allocated to GPIO 45 and 46 in the pin drop down menus.

I am using an FT232 USB ttl adapter. this works to see the debug data if i connect to the main serial pins. so confident the adapter is working.

on one heltec I have shorted pins 45 and 46 to loop back. but when I transmit in my terminal program I don’t see echo’d data.

Am I missing something?

Thanks in advance

Stu