“Start message not received within 10 seconds, disconnecting”
The Problem:
Trying to use the openLRSng Configurator app and connect to my OrangeRx Open LRS 433MHz Transmitter 1W just wouldn't connect and keeps reporting the error "Start message not received within 10 seconds, disconnecting"
The Solution:
- Connect your 3.3V FTDI USB to serial adapter to the pins inside the Tx module. At a minimum you need Gnd <-> Gnd, Tx <->Rx, Rx<->Tx connected.
- Make sure the Vcc pin is disconnected.
- Install the Tx module in your transmitter. I'm using a Taranis.
- With the transmitter turned off, advance the throttle to half. This stops power to the Tx module*.
- In the , openLRSng Configurator app enable the auto-connect check box next to "Connect".
- Turn the Tx turned on.
- Plug in the USB to serial FTDI.
- Wait until you see "Serial port successfully opened with ID: #"
- Pull the throttle down so the Tx initialises.
- There should be a couple of beeps and the configurator continues to connect.
Now you can configure your openLRSng Tx and Rx modules all via the Google Chrome Configurator and even use the Spectrum Analyser function.
* I'm not sure if other transmitter brands have the feature where power isn't applied to the Tx module until the throttle is at zero. I found the timing was important between connecting the USB and activating the Tx. With the Taranis it seemed to be much easier by having the Transmitter in the on state but with throttle up, as soon as the "connecting" message appeared, pull the throttle and it connected.
I did manage to connect without using the throttle up trick but only once and I couldn't get it to do it again. I read a post on rcgroups where a guy said it took him 20 tries before it would connect.