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By Sam43054
SparkX SAMD21 Pro RF 1W

A few questions

Is that a mico or mini USB?

the “Battery Input Voltage” Disclaimer says to power around 5v.. Would a 3 AA pack (4.5v) be enough or best to use a 4 AA pack (6v)? or is it really meant to be used with a LiPo battery ?

In the example product code it has “#define LORA_DEFAULT_SPI_FREQUENCY 500000 ” This is on the 915 mhz ? is the 500000 number just a random number and need replaced ?

It appears there is a u.FL connector on the side with the USB connector and one on the actual chip mounted on the back– What u.FL connector would have the best “RF energy output” ?