david.tahir/QuadMeUp_Crossbow
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Pawel Spychalski
2018-05-07 13:55:15 +02:00
parent ce1586a667
commit 8bef083c0a
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README.md
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@@ -76,6 +76,17 @@ Total length of `RC_DATA` payload is 9 bytes
**TX** sends `PING` frame with curent `micros`. If **RX** receives `PING` frame, it respons
its payload as `PONG` frame.
# RSSI
1. Receiver RSSI for the last received packet is injected as channel 11
1. RSSI is scaled in **dB**, NOT **percent**
1. RSSI 0 in flight controller means 40dB RSSI in RF chip on last packet received
1. RSSI 100 in flight controller means 140dB RSSI in RF chip on last packet received
1. Rule of thumb: to increase distance twice you need 6dB assuming nothing else will interfere
1. If at 100m RSSI is 40, at 200m should be around 34
1. I had successful flight with RSSI below `15`
1. With correct antennas, at 1km RSSI should be around `20`
# OpenTX setup
OpenTX 2.2.1 or newer is required with enabled **External RF** SBUS.