3 QRO external amplifier usage

sh123 edytuje tę stronę 2022-12-19 11:12:09 +02:00

It is possible to get 30-40% TX only coverage increase in urban environment by using additional external 1-2W amplifier (about 6$ on Aliexpress), which will give 10-12 dB signal increase, achieved approximately 20 km coverage in moderate urban environment and about 15 km with almost 100% packet receiving.

• Implement simple amplifier power switching by using relay from one of free ESP32 pinouts, use one of popular schematics from google, do NOT keep this amplifier always ON
• Set LoRa output power to around 8 dBm cfg.LoraPwr = 8;, NB! higher than 10 dBm levels can destroy amplifier
• Set cfg.PttEnable to true
• Set cfg.PttPin to your relay control pin
• Optionally change cfg.PttTxDelayMs and cfg.PttTxTailMs depending on your relay switching times