+20dBm support, CRC in LoRa header and config.py removed in favour of RPi-LoRa-KISS-TNC.ini.

CHANGELOG.md

@@ -22,3 +22,17 @@ All notable changes to this project will be documented in this file.
 
 ### Fixed
 - LoRa APRS header (<\xff\x01) was not added to the payload, due to an indentation fault. Long live Python!
+
+## [0.0.2] - 2022-02-08
+
+### Added
+- Support for 20dBm output power. Temporarily hard coded in source, but in next version it should be configurable via the configuration file.
+
+## [0.0.3] - 2022-02-10
+
+### Changed
+- 20dBm output power can now be selected from configuration file instead of being hard coded in program.
+- Enabled CRC in header of LoRa frames. Now frames are crc-checked at the receiving side.
+
+### Removed
+- Config.py as configuration is now completely removed. Configuration is now done completely via RPi-LoRa-KISS-TNC.ini

LoraAprsKissTnc.py

@@ -93,9 +93,25 @@ class LoraAprsKissTnc(LoRa):
             codingrate = CODING_RATE.CR4_5
         
         self.set_coding_rate(codingrate)        
-        self.set_ocp_trim(100)
-
-        self.set_pa_config(paSelect, MaxoutputPower, outputPower)
+        
+        if outputPower == 20:
+            # Current limiter 180mA for +20dBm
+            self.set_ocp_trim(180)
+
+            # Set PA to +20dBm
+            self.set_pa_config(1, 15, 15)        
+            self.set_pa_dac(1)
+            #print("+20dBm")
+        else:
+            # Current limiter 100mA for 17dBm max
+            self.set_ocp_trim(100)
+            
+            self.set_pa_config(paSelect, MaxoutputPower, outputPower)                    
+            #print("max. +17dBm")            
+            
+        # CRC on
+        self.set_rx_crc(1)
+        
         self.set_max_payload_length(255)
         self.set_dio_mapping([0] * 6)
         self.server = server

README.md

@@ -11,6 +11,4 @@ The software controls the LoRa transceiver connected to the Raspberry´s SPI bus
 I also designed my own (open source) hardware for it: a board holding a Raspberry Pi Zero 2 W, an SX1278 LoRa transceiver and a power supply with on/off button to safely switch on and off the system. The design files can be found on my website: [RPi LoRa_shield](https://meezenest.nl/mees/RPi_LoRa_shield.html)
 
 ### To Do
-* The program (or the LoRa module) still crashes occasionally. After restarting the program (kissattach/socat/RPi-LoRa-KISS-TNC.py) it all works again. Need to investigate.
-* Completely remove config.py in favour of RPi-LoRa-KISS-TNC.ini
 * Add raw TCP KISS socket for true AX.25 over KISS

RPi-LoRa-KISS-TNC.ini

@@ -22,12 +22,24 @@ bandwidth=BW125
 #    CR4_8
 codingrate=CR4_5
 appendSignalReport=False
-paSelect = 1
+# paSelect only tested at 1
+paSelect=1
+# MaxoutputPower only tested at 15
 MaxoutputPower = 15
-outputPower = 15
+# 0 ... 15 => +2 ... +17dBm
+# 20 = +20dBm
+outputPower = 20
 
 [KISS]
 # Settings for KISS
 TCP_HOST=0.0.0.0
 TCP_PORT_AX25=10001
 TCP_PORT_RAW =10002
+
+[AXUDP]
+# settings for AXUDP
+AXUDP_REMOTE_IP=192.168.0.185
+AXUDP_REMOTE_PORT=20000
+AXUDP_LOCAL_IP=0.0.0.0
+AXUDP_LOCAL_PORT=20000
+USE_AXUDP=False

Start_lora-tnc.py

@@ -25,7 +25,7 @@ import configparser
 
 # Read configuration file #
 parser = configparser.ConfigParser()
-parser.read('RPi-LoRa-KISS-TNC.ini')
+parser.read('/home/marcel/ham/RPi-LoRa-KISS-TNC/RPi-LoRa-KISS-TNC.ini')
 
 config_frequency = float(parser.get('LoRaSettings', 'frequency'))
 config_preamble = int(parser.get('LoRaSettings', 'preamble'))