add gps

luci-app-gpoint-main/root/usr/share/gpoint/modems/dell.lua

@@ -0,0 +1,44 @@
+common_path = '/usr/share/gpoint/lib/?.lua;'
+package.path = common_path .. package.path
+
+
+local nmea = require("nmea")
+local serial = require("serial")
+local nixio   = require("nixio.fs")
+
+local dell = {}
+
+local DELL_BEGIN_GPS  = "AT+GPS=1"
+local DELL_END_GPS    = "AT+GPS=0"
+
+-- automatic activation of the NMEA port for data transmission
+function dell.start(port)
+	local p = tonumber(string.sub(port, #port)) + 1
+	p = string.gsub(port, '%d', tostring(p))
+	local error, resp = true, {
+		warning = {
+			app = {true, "Port is unavailable. Check the modem connections!"},
+			locator = {}, 
+			server = {}
+		}
+	}
+	-- DELL DW5821 series default NMEA /dev/ttyUSB2
+	local fport = nixio.glob("/dev/tty[A-Z][A-Z]*")
+	for name in fport do
+		if string.find(name, p) then
+			error, resp = serial.write(p, DELL_BEGIN_GPS)
+		end
+	end
+	return error, resp
+end
+-- stop send data to NMEA port
+function dell.stop(port)
+	error, resp = serial.write(port, DELL_END_GPS)
+	return error, resp
+end
+-- get GNSS data for application
+function dell.getGNSSdata(port)
+	return nmea.getAllData(port)
+end
+
+return dell