Add systemd service file for wenet tx, add --picamhq option

start_tx_systemd.sh

@@ -0,0 +1,65 @@
+#!/bin/bash
+#
+#	Wenet TX-side Initialisation Script - Systemd Unit Version
+#	2024-07-21 Mark Jessop <vk5qi@rfhead.net>
+#
+#	Run this to set up an attached RFM22B/RFM98W and start transmitting!
+#	Replace the transmit frequency and callsign with your own.
+#
+
+# A callsign which will be included in the Wenet Packets.
+# This MUST be <= 6 characters long.
+MYCALL=VK5ARG
+
+# The centre frequency of the Wenet transmission.
+TXFREQ=443.500
+
+# Baud Rate
+# Known working transmit baud rates are 115200 (the preferred default).
+# Lower baud rates *may* work, but will need a lot of testing on the receiver
+# chain to be sure they perform correctly.
+BAUDRATE=115200
+
+# GPS Port
+# Note that we only support uBlox GPS units
+GPSPORT=/dev/ttyACM0
+
+# CHANGE THE FOLLOWING LINE TO REFLECT THE ACTUAL PATH TO THE TX FOLDER.
+# i.e. it may be /home/username/dev/wenet/tx/
+cd /home/pi/wenet/tx/
+
+# Wait here until the SPI devices are available.
+# This can take a few tens of seconds after boot.
+timeout=20
+while : ; do
+	[[ -e "/dev/spidev0.0" ]] && break
+
+	if [ "$timeout" == 0 ]; then
+		echo "Did not find SPI device in timeout period!"
+		exit 1
+        # At this point this script exits, and systemd should restart us anyway.
+	fi
+
+	echo "Waiting another 2 seconds for SPI to be available."
+	sleep 2
+	((timeout--))
+done
+
+echo "Waiting another 10 seconds before startup."
+sleep 10
+
+#Uncomment to initialise a RFM22B (untested with Python 3)
+#python init_rfm22b.py $TXFREQ
+# Uncomment for use with a RFM98W
+python3 init_rfm98w.py --frequency $TXFREQ --baudrate $BAUDRATE
+
+
+# Start the main TX Script.
+# Do not add a & on the end of these lines when running via systemd!
+
+# Note that you can also add --logo /path/to/logo.png  to this to add a logo overlay.
+# If using a Picam HQ, add a --picamhq argument into this line before the --gps argument
+python3 tx_picam_gps.py --baudrate $BAUDRATE --gps $GPSPORT $MYCALL
+
+# If you don't want any GPS overlays, you can comment the above line and run:
+# python WenetPiCam.py --baudrate $BAUDRATE $MYCALL

tx/WenetPiCam.py

@@ -357,6 +357,7 @@ if __name__ == "__main__":
 	parser.add_argument("callsign", default="N0CALL", help="Payload Callsign")
 	parser.add_argument("--txport", default="/dev/ttyAMA0", type=str, help="Transmitter serial port. Defaults to /dev/ttyAMA0")
 	parser.add_argument("--baudrate", default=115200, type=int, help="Transmitter baud rate. Defaults to 115200 baud.")
+	parser.add_argument("--picamhq", default=False, action="store_true", help="Use PiCamera HQ image resolutions.")
 	args = parser.parse_args()
 
 	callsign = args.callsign
@@ -367,10 +368,20 @@ if __name__ == "__main__":
 
 	tx = PacketTX.PacketTX(serial_port=args.txport, serial_baud=args.baudrate, callsign=callsign)
 	tx.start_tx()
+	# Set the source and transmit image resolutions.
+	# For the PiCam HQ, we have a higher source resolution that we want to make use of!
+	# Note the transmit resolutions *must* be a multiple of 16.
+	if args.picamhq:
+		# Picam HQ Resolutions
+		_src_res = (4056,3040)
+		_tx_res = (1520,1136)
+	else:
+		# Picam V2 resolutions.
+		_src_res = (3280,2464)
+		_tx_res = (1488,1120)
 
-
-	picam = WenetPiCam(src_resolution=(1920,1088), 
-		tx_resolution=(1920,1088), 
+	picam = WenetPiCam(src_resolution=_src_res, 
+		tx_resolution=_tx_res, 
 		callsign=callsign, 
 		num_images=5, 
 		debug_ptr=tx.transmit_text_message, 

tx/tx_picam_gps.py

@@ -22,6 +22,7 @@ parser.add_argument("--gps", default="/dev/ttyACM0", help="uBlox GPS Serial port
 parser.add_argument("--logo", default="none", help="Optional logo to overlay on image.")
 parser.add_argument("--txport", default="/dev/ttyAMA0", type=str, help="Transmitter serial port. Defaults to /dev/ttyAMA0")
 parser.add_argument("--baudrate", default=115200, type=int, help="Transmitter baud rate. Defaults to 115200 baud.")
+parser.add_argument("--picamhq", default=False, action="store_true", help="Use PiCamera HQ image resolutions.")
 args = parser.parse_args()
 
 callsign = args.callsign
@@ -150,9 +151,23 @@ def post_process_image(filename):
 	return
 
 
+
 # Finally, initialise the PiCam capture object.
-picam = WenetPiCam.WenetPiCam(src_resolution=(3280,2464), 
-		tx_resolution=(1488,1120), 
+
+# Set the source and transmit image resolutions.
+# For the PiCam HQ, we have a higher source resolution that we want to make use of!
+# Note the transmit resolutions *must* be a multiple of 16.
+if args.picamhq:
+	# Picam HQ Resolutions
+	_src_res = (4056,3040)
+	_tx_res = (1520,1136)
+else:
+	# Picam V2 resolutions.
+	_src_res = (3280,2464)
+	_tx_res = (1488,1120)
+
+picam = WenetPiCam.WenetPiCam(src_resolution=_src_res, 
+		tx_resolution=_tx_res, 
 		callsign=callsign, 
 		num_images=5, 
 		debug_ptr=tx.transmit_text_message, 

wenet_tx.service

@@ -0,0 +1,18 @@
+[Unit]
+Description=wenet_tx
+After=basic.target
+
+[Service]
+# Update this path if not running as the pi user!
+ExecStart=/home/pi/wenet/start_tx_systemd.sh
+Restart=always
+RestartSec=30
+# This one too!
+WorkingDirectory=/home/pi/wenet/
+
+# NOTE - Wenet unfortunately needs to be run at root, else we can't easily set the system time.
+#User=pi
+SyslogIdentifier=wenet_tx
+
+[Install]
+WantedBy=multi-user.target