CRC handling in raw LoRa mode

[bmarkus]

What is about the CRC handling in raw LoRa mode? I do not find any reference in the docs.

[nevercast]

Sorry for the year late grave-dig on this, I wanted this answer for myself and I landed on this post.

Here we see a crcOn parameter in the driver
https://github.com/pycom/pycom-micropython-sigfox/blob/4481a1c283be97640592ea2a0440830e336064de/drivers/sx127x/sx1276/sx1276.c#L364

Here we see the lora micropython module invoking these functions
https://github.com/pycom/pycom-micropython-sigfox/blob/4481a1c283be97640592ea2a0440830e336064de/esp32/mods/modlora.c#L1093-L1101

The arguments and parameters formatted:

RadioModems_t modem = MODEM_LORA, 
uint32_t bandwidth = init_data->bandwidth, 
uint32_t datarate = init_data->sf,
uint8_t coderate = init_data->coding_rate, 
uint32_t bandwidthAfc = 0, 
uint16_t preambleLen = init_data->preamble,
uint16_t symbTimeout = symbol_to, 
bool fixLen = LORA_FIX_LENGTH_PAYLOAD_OFF,
uint8_t payloadLen = 0, 
bool crcOn = true,   <-- CRC enabled.
bool freqHopOn = 0, 
uint8_t hopPeriod = 0, 
bool iqInverted = init_data->rxiq, 
bool rxContinuous = true

This is the same for both tx and rx.

This setup function is invoked when in LORA (Raw) mode: https://github.com/pycom/pycom-micropython-sigfox/blob/4481a1c283be97640592ea2a0440830e336064de/esp32/mods/modlora.c#L821

TL;DR; Yes, CRC is enabled internally.