[uncle_bob]

A couple of questions:
1. Am I getting ahead of myself in expecting to see some meaningful data on the TFT screen as there is no Tx unit powered up yet?
1. Where does the RTC get it's date/time information from?
2. Do I need to install third party software maybe Cumulus etc to provide the date time from my PC via the USB serial connection?
3. The Rx board seems happy to power from the Nano USB connector without the external supply. Are there any rules about powering the Rx board. ie external, nano, both at the same time.
4. Should I see any reading from the BMP085? All readings are 0 at the moment with no TX unit.

Dave

Hi Dave,
You have point 1 twice
In absence of Werk_AG, my answers may be only partially correct, but may help until he pops in.

1) Yes. IIRC the screen updates on receiving a packet. Werk_AG may need to confirm this.
1a) The RTC gets it time sync from Cumulus. You can run a sketch to update it also.
2) See above.
3) The RX unit should be powered by an external power supply, especially when the data relay TX module is installed.
4) Probably related to 1 or you're not running the latest version..

1) and 4) IIRC can be forced to update by uncommenting this line (around line number 422) in the RX code
//Update_Display(); // HERE JUST FOR TESTING
and recompiling and uploading. Remember to undo this step when your TX unit is up and running.