Add SysId configuration, (#408)

* Add SysId configuration, requires ExpressLRS/ExpressLRS#2891 * Update wordlist.txt --------- Co-authored-by: Nikhil Parikh <[email protected]>
ExpressLRS · Oct 26, 2024 · fe28658 · fe28658
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diff --git a/.wordlist.txt b/.wordlist.txt
@@ -480,11 +480,13 @@ MatchTX
 feedforward
 setpoint
 unticked
+sysID
+sysIDs
 Lvl
 Pwr
 pitmode
 HV
 DAC
 Bidirectionality
 VTXes
-OpenVTX
+OpenVTX
diff --git a/docs/software/mavlink.md b/docs/software/mavlink.md
@@ -53,6 +53,16 @@ The minimum versions to use this feature are:
 
 1. Configure your usual power, packet rate, etc. The telemetry ratio will be preset to 1:2 (and cannot be changed while in MAVLink mode).
 
+1. (Optional) Configure Source and Target SysIDs
+
+    1. Power-cycle the receiver
+
+    2. Go to `Other Devices` and select your receiver
+
+    3. Set `Target SysID` to the vehicle SysID
+
+    4. Set `Source SysID` to preferred GCS SysID
+
 1. Wire the RX to a free UART on your flight controller that is suitable for TLM + RC. A DMA-capable UART is recommended.
 
 
@@ -115,10 +125,9 @@ When set to MAVLink mode, ELRS changes the allocation of uplink and downlink fra
 - Uplink frames from TX to RX continue to include stick/switch data in the standard ELRS format
 - Uplink frames are opportunistically replaced with MAVLink data from your GCS to your aircraft, which is limited to a maximum of 50% of the link's upstream bandwidth. In general, MAVLink from GCS to the aircraft consumes very little bandwidth, due to it being mainly GCS heartbeats.
 
-
 - Downlink telemetry frames from RX to TX are completely replaced by MAVLink data
 - Your TX converts the MAVLink telemetry into standard CRSF format which is understood by EdgeTX
 
 ### Stubborn Sender
 
-ELRS uses its stubborn telemetry sender system for MAVLink messages - this system retries packets which weren't delivered, keeping MAVLink link quality high over longer distances and/or with interference.
+ELRS uses its stubborn telemetry sender system for MAVLink messages - this system retries packets which weren't delivered, keeping MAVLink link quality high over longer distances and/or with interference.