Aprs using Lora sx1278
Clone of this project, using a SX1278 Lora module or just the IC SX1278 as aprs tx, ALL credit goes to https://github.com/DO4AS/jufo-project-radiosonde I have only made the pcb:s and edited the fw in a small way that fits my needs.
PCB for both LORA sx1278 module and barebone 1278 ic, make sure you get the correct module, at least 4 Lora models avalible with different pinout.
The sketch on the 328 works at 8Mhz or 16Mhz, Im using 8Mhz to save 5mA compared to 16Mhz
Fuses for 328: FD D9 FE
1278-Micro_2021-10-09.zip is the CAM files for pcb production/order
Latest PCB have the option for tcxo drive of the 1278, but the standard 32Mhz xo footprint can stil be used, gps antenna moved to the "top" + some small tweaks and fixes.
Adjust the "const float baud_adj = 0.952;" setting for 3 or 4 "strokes" in Direwolf, see info here https://forums.qrz.com/index.php?threads%2Fdirewolf-aprs-output.600522%2F&fbclid=IwAR0wUjOZmizGcujBzJqjSxanfelDZbqJ7fJmPpOwpc3_y3LSQ0mrltJrEoM
I have the best decode rate with 0.950 - 0.964 depending on xo/tcxo used, so you need to tweek this for every board.
Also test the transmitted audio against this program - AFSK1200, if it decodes the audio it should maximize the chanses of your signal to be decoded while in flight https://sourceforge.net/projects/qtmm/
DG4NOB version incorporates more telemetry readings like Temp from internal 328 sensor, Voltage, Vertical speed in m/s etc
TBTracker and horusbinary_tracker use the same pcb layout and is 100% compatible with the above, those fw transmitt, 4FSK, RTTY and Lora, original authors git at https://github.com/RoelKroes with small adjustment to fit "my" pcb layout