62.5khz bw lora without TCXO?

[kjm1102]

Whenever I get a new batch of lora boards I have a furtive attempt at bw=62.5, sf=12 comms with 4 byte sensor data, often the crystals are so close that it works some of the time. In my last batch I found 2 boards where the polled board always responded to the polling board but the latter only received the polled boards reply about 30% of the time.

https://semtech.my.salesforce.com/sfc/p/#E0000000JelG/a/3n000000qQ3i/94uZjLFPeXyNoZnRfCQ6b5L3g_nhJkMFFRPrGgUfuDc secn 4.2 mentions software trimmable capacitor banks to tweak the crystal frequency. I saw how to do this on one of the arduino forums but can't figure out how to do it in upython.

The non exposure of infrequently used device functionality by upython is a recurring problem for those us not conversant with C+ IDEs. Is there an easy way around this or is it just a fact of life that a certain level of nitty gritty you have to go to C+?