the receiver. By default, the SSID is set to the last digit of
the device serial number.
- The APRS packet format includes a comment field that can have
- arbitrary text in it. AltOS uses this to send status
- information about the flight computer. It sends four fields as
- shown in the following table.
+ The APRS packet format includes a comment field that
+ can have arbitrary text in it. AltOS uses this to send
+ status information as shown in the following table.
.Altus Metrum APRS Comments
[options="header",cols="1,1,3"]
|B4.0
|Altimeter Battery Voltage
+ ifdef::altusmetrum[]
+
|4
|A3.7
|Apogee Igniter Voltage
|6
|1286
|Device Serial Number
+
+ endif::altusmetrum[]
+ ifdef::telegps[]
+
+ |4
+ |1286
+ |Device Serial Number
+
+ endif::telegps[]
+
|====
+ ifdef::altusmetrum[]
Here's an example of an APRS comment showing GPS lock with 6
satellites in view, a primary battery at 4.0V, and
apogee and main igniters both at 3.7V from device 1286.
....
L6 B4.0 A3.7 M3.7 1286
....
+ endif::altusmetrum[]
+
+ ifdef::telegps[]
+ Here's an example of an APRS comment showing GPS lock with 6
+ satellites in view and a primary battery at 4.0V from device 1876.
+
+ ....
+ L6 B4.0 1876
+ ....
+ endif::telegps[]
- Make sure your primary battery is above 3.8V, any
- connected igniters are above 3.5V and GPS is locked
- with at least 5 or 6 satellites in view before
- flying. If GPS is switching between L and U regularly,
- then it doesn't have a good lock and you should wait
- until it becomes stable.
+ Make sure your primary battery is above 3.8V
+ ifdef::altusmetrum[]
+ any connected igniters are above 3.5V
+ endif::altusmetrum[]
+ and GPS is locked with at least 5 or 6 satellites in
+ view before flying. If GPS is switching between L and
+ U regularly, then it doesn't have a good lock and you
+ should wait until it becomes stable.
If the GPS receiver loses lock, the APRS data
transmitted will contain the last position for which