3 ms·
Directionality. If you have a single gateway with tons of power for tx, is it ultra sensitive for RX and what the requirements on the end devices from a power
by dmritard96 10y ago
Directionality. If you have a single gateway with tons of power for tx, is it ultra sensitive for RX and what the requirements on the end devices from a power perspective?
- slewis 10y agoYes -137dBm sensitivity: http://www.semtech.com/wireless-rf/rf-transceivers/sx1272/ http://www.semtech.com/wireless-rf/rf-transceivers/sx1272/ In the blog post we were using 27dBm transmissions. At that level the radio and power amplifier draw about 1.5W. If a transmission takes .3seconds that's .5Watt-seconds. So with a single AA battery (about 5Wh) you can do 40000 transmissions. Transmissions can be much shorter in time depending on radio parameters, by a factor of 32 at most, but range can be affected.