MODBUS Self-Slave Data

The CTM functions as a remote wireless gateway, mapping modem inputs/outputs to MODBUS IDs and responding to queries.

Additionally, the CTM Slave can transmit modem-specific data in MODBUS format, such as RF signal strength.

Register	Hex Value Example	Value Example	Conversion	SYSDB Value
1-4		0 or 12	12 Volts	AIN1-6
7	04BE	1214 (16-bit INT)	1214/100 = 12.14 Volts	GPIO_VCC
8	0048	72 (16-bit INT)	-72	CELL_RSSI
9	003E	62 (16-bit INT)	62 Celsius	GPIO_TEMP
10	1D07	7431 (16-bit INT)	Convert Hex to Dec Hex 1D \| 07 1D = 29 \| 07 =7 Day 29 \| Month 7	GPS Day & Month derived from GPS_ISO8601
11	07E5	2021 (16-bit INT)	Year 2021	GPS Year derived from GPS_ISO8601
12	120D	4621 (16-bit INT)	Convert Hex to Dec Hex 12 \| 0D 12 = 17 \| 0D = 59 17 Hours \| 59 Minutes	GPS Hours & Minutes derived from GPS_ISO8601
13	3241	12865 (16-bit INT)	Convert Hex to Dec Hex 32 \| 41 32 = 50 \| 41 to Ascii = A 50 Seconds\| GPS_VALID=A=True	GPS Seconds & Valid Flag derived from GPS_ISO8601 and GPS_VALID
14,15	3F5C 14E6	0.85969388 (32bit Float)	0.85969388 Radians Multiply by 180/pi 49.25683099735 Degrees	GPS Latitude
16,17	C009 6377	-2.14669585 (32bit Float)	-2.14669585 Radians Multiply by 180/pi -122.9966121036 Degrees	GPS Longitude
18	0014	20 (16-bit INT)	20 m/s 72 km/hour	GPS Speed
19	00F7	247 (16-bit INT)	247 degrees	GPS Heading

Register	Hex Value Example	Value Example	Conversion	SYSDB Value
1-4		0 or 1	Active or Not Active, No Conversion	DIN1-4

Register	Hex Value Example	Value Example	Conversion	SYSDB Value
1-4		0 or 1	Active or Not Active, No Conversion	DOUT1-4