HT-RA62 configaration help

Development
1

I have questions about HT-RA62 module, since documentation is not complete.

  • Is it XTAL or TXCO?

  • I saw it’s powered, with what **tcxoVoltage** and **delay** and **cap** configuration it needs in setDIO3AsTcxoCtrl?

  • especially when startup delay is needed

  • Is 4bytes setRfFrequency MSB or LSB?

  • What about preamble in SetPacketParams? Is it MSB first?

  • How long CalibrateImage take? Do I need to wait for it in some state?

  • Does LowDataRateOptimize need to apply both tx and rx side? Or it breaks compatibility?

  • Is setDIO2AsRfSwitchCtrl set to 1 needed?
2

As far as I know the HT-RA62 uses a TCXO at the default voltage of 3.3V.

And I also think you setDIO2AsRfSwitchCtrl to 1 as normal.

As for the rest, the LoRa module is an SX1262 so all the information yo want would be in the SX1262 datasheet.

Why are you asking anyway, all the LoRa libraries I have come across setup the parameters you mention for you ?

1 Like
3

Thank you for the info!

Radiolib is abstracted away so much that is very hard to see what registers are written.

What are stand on LowDataRateOptimize ? Does it break compatibility?

4

Use same settings on TX and RX.

Some libraries will allow you to either manually set it on or off or have it set automatically.

5

And is it enabled in meshtastic firmware?

6

I have not checked.

You would assume so, if it was not some of the Long range settings would have an issue with packet corruption.

7

Never mind, there is zero reference for it in Radiolib.

8

In the RadioLib when set to auto mode it does a calculation as to whether LowDataRateOptimize should be set to on or off.