From f04a6655a4f0570cbebfd5ff48c61f5cc8de3cbc Mon Sep 17 00:00:00 2001
From: Jens Ahrensfeld <jens@jayfield.org>
Date: Sun, 15 Mar 2026 21:08:19 +0100
Subject: [PATCH] - fixed parsing - added RMC

---
 network_backend.py |  6 ++++--
 nmea/GLL.py        |  4 +++-
 nmea/GSA.py        |  4 +++-
 nmea/GSV.py        |  4 +++-
 nmea/RMC.py        | 37 +++++++++++++++++++++++++++++++++++++
 5 files changed, 50 insertions(+), 5 deletions(-)
 create mode 100644 nmea/RMC.py

diff --git a/network_backend.py b/network_backend.py
index 129c754..3509a23 100644
--- a/network_backend.py
+++ b/network_backend.py
@@ -10,6 +10,7 @@ from nmea.GLL import Gll
 from nmea.GSA import Gsa
 from nmea.GSV import Gsv
 from nmea.GGA import Gga
+from nmea.RMC import Rmc
 
 class NetworkBackend(ABackend):
 	def __init__(self, servers: list[dict]):
@@ -92,10 +93,11 @@ if __name__ == "__main__":
 	mc = NetworkBackend(server_list)
 	for grm in [" neo-f9p", "zed-x20p"]:
 		rx_list = [
-			Gll(grm, 'GP'),
-			Gsa(grm, 'GP'),
+			Gll(grm, 'GN'),
+			Gsa(grm, 'GN'),
 			Gsv(grm, 'GP'),
 			Gga(grm, 'GP'),
+			Rmc(grm, 'GN'),
 			Gga(grm, 'GN')
 		]
 		# Topology
diff --git a/nmea/GLL.py b/nmea/GLL.py
index 7ae617b..85973da 100644
--- a/nmea/GLL.py
+++ b/nmea/GLL.py
@@ -11,6 +11,7 @@ class Gll(Nmea):
 			self.ew_indicator = None
 			self.utc_time = None
 			self.status = None
+			self.mode = None
 			self.checksum = None
 
 		def __repr__(self):
@@ -31,6 +32,7 @@ class Gll(Nmea):
 		self.data.ew_indicator = data_list[4]
 		self.data.utc_time = data_list[5]
 		self.data.status = data_list[6]
-		self.data.checksum = data_list[7]
+		self.data.mode = data_list[7].split('*')[0]
+		self.data.checksum = data_list[7].split('*')[1]
 
 		print(f"{self.name}:{self.msg} {self.data}")
diff --git a/nmea/GSA.py b/nmea/GSA.py
index 0f9a0b8..f977866 100644
--- a/nmea/GSA.py
+++ b/nmea/GSA.py
@@ -11,6 +11,7 @@ class Gsa(Nmea):
 			self.p_dop = None
 			self.h_dop = None
 			self.v_dop = None
+			self.signal_id = None
 			self.checksum = None
 
 		def __repr__(self):
@@ -31,6 +32,7 @@ class Gsa(Nmea):
 		self.data.p_dop = float(data_list[15])
 		self.data.h_dop = float(data_list[16])
 		self.data.v_dop = float(data_list[17])
-		self.data.checksum = data_list[18]
+		self.data.signal_id = data_list[18].split('*')[0]
+		self.data.checksum = data_list[18].split('*')[1]
 
 		print(f"{self.name}:{self.msg} {self.data}")
diff --git a/nmea/GSV.py b/nmea/GSV.py
index bb811d1..25a7fa0 100644
--- a/nmea/GSV.py
+++ b/nmea/GSV.py
@@ -12,6 +12,7 @@ class Gsv(Nmea):
 			self.elevation = []
 			self.azimuth = []
 			self.snr = []
+			self.signal_id = None
 			self.checksum = None
 
 		def __repr__(self):
@@ -40,7 +41,8 @@ class Gsv(Nmea):
 			data.azimuth.append(data_list[data_set_size*n+6])
 			data.snr.append(data_list[data_set_size*n+7])
 
-		data.checksum = data_list[data_set_size*(num_sats_in_msg-1)+8]
+		data.signal_id = data_list[data_set_size*(num_sats_in_msg-1)+8].split('*')[0]
+		data.checksum = data_list[data_set_size*(num_sats_in_msg-1)+8].split('*')[1]
 
 		if self.data.number_of_msg == self.data.seq_number:
 			self.data = Gsv.Msg()
diff --git a/nmea/RMC.py b/nmea/RMC.py
new file mode 100644
index 0000000..7083c69
--- /dev/null
+++ b/nmea/RMC.py
@@ -0,0 +1,37 @@
+from msg_container import MsgContainer
+from nmea.receiver import Nmea
+
+
+class Rmc(Nmea):
+	class Msg:
+		def __init__(self):
+			pass
+
+		def __repr__(self):
+			return f"{self.__dict__}"
+
+	def __init__(self, name: str, tid: str):
+		Nmea.__init__(self, name, tid=tid, msg_type="RMC")
+		self.msg = None
+		self.data = Rmc.Msg()
+
+	def on_recv(self, msg: MsgContainer):
+		data = msg.data.decode(encoding="utf-8")
+		data_list = data.split(',')
+		self.msg = data_list[0]
+		self.data.utc_time = data_list[1]
+		self.data.status = data_list[2]
+		self.data.latitude = float(data_list[3])/100
+		self.data.ns_indicator = data_list[4]
+		self.data.longitude = float(data_list[5])/100
+		self.data.ew_indicator = data_list[6]
+		self.data.speed = data_list[7]
+		self.data.course = data_list[8]
+		self.data.date = data_list[9]
+		self.data.mag_var = data_list[10]
+		self.data.mag_var_ew = data_list[11]
+		self.data.mode = data_list[12]
+		self.data.nav_status = data_list[13].split("*")[0]
+		self.data.checksum = data_list[13].split("*")[1]
+
+		print(f"{self.name}:{self.msg} {self.data}")