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hallard / LoRa-E5-Breakout

LoRa-E5 Breakout board
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Bad RF performance with mbed os #2

Closed Mircerson closed 2 years ago

Mircerson commented 2 years ago

Hi there,

Just want to say great work on the module and board, looks solid.

Using the latest mbed os LoRaWan example and the latest custom targets library, the RF performance is quite bad ( i.e. RSSI over -100 and SNR of around 0 to -5 when placed close to the gateway). I am using an off-the-shelf antenna ( Linx USP-410 ) and the RL is around -13 dB which is quite decent ( without any matching ).

I have tested the same board with the STM32Cube example from Seeed's website and it's significantly better ( i.e. RSSI -38-40 and SNR of 10 or more ) in the same spot.

Not sure you have experienced something like that using the Seeed E5 modules in the past?

Thanks, Mircea

Mircerson commented 2 years ago

Adding the following to the custom target seems to fix this: "stm32wl-lora-driver.rf_switch_config":"RBI_CONF_RFO_HP"