Message Type 30, PCTM
Proprietary NMEA message containing the current wireless network (e.g. cellular network, Wi-Fi network) status.
Note: If used with Store and Forward the network status parameters will be invalid.
Cellular network message format
$PCTM,-xxxdBm,-yyydBm,zzzzz,b,n,r,nnn.nnn.nnn.nnn*hh<CR><LF>
Where:
xxx is the current EV-DO network signal strength, or HSPA network signal strength (firmware version R1.3.0 and above only)
yyy is the current 1xRTT network signal strength (CDMA only; not available for HSPA where value always set to -0dBm)
zzzzz is the current System ID (SID) (CDMA only; not available for HSPA where value always set to 0)
b is the wireless radio band:
| Value | Band |
|---|---|
| 0 | unknown |
| 1-44 | B1 - B44 as defined by E-UTRA |
n indicates the network type, also known as Radio Access Technology (RAT):
| Value | RAT |
|---|---|
| 0 | unknown |
| 1 | CDMA |
| 2 | EVDO |
| 3 | EVDOrevA |
| 4 | Ehrpd |
| 5 | GSM |
| 6 | GPRS |
| 7 | EDGE |
| 8 | UMTS |
| 9 | HSDPA |
| 10 | HSUPA |
| 11 | HSPA |
| 12 | HSPA+ |
| 13 | DC-HSPA |
| 14 | LTE |
r is the registered flag: 0 = not registered, 1 = registered.
nnn.nnn.nnn.nnn is the modem's assigned IP address.
hh is the message checksum
Wi-Fi network message format
$PCTM,ttt,essid,ap:ap:ap:ap:ap:ap,txdBm,lq,-rxdBm,-nodBm,nnn.nnn.nnn.nnn*hh
Where:
ttt is the Wi-Fi technology
essid is the ESSID of the access point
ap:ap:ap:ap:ap:ap is the access point MAC address
tx is the TX power
lq is the link quality
rx is the RX signal strength
no is the noise level
nnn.nnn.nnn.nnn is the current IP address of modem's WAN interface
hh is the message checksum
Examples
EV-DO:
$PCTM,-87dBm,-100dBm,16422,1,3,1,96.1.5.204*0B
HSPA (firmware version R1.3.0 and above only):
$PCTM,-90dBm,-0dBm,0,0,6,1,10.163.78.249*33
Wi-Fi:
$PCTM,IEEE802.11abg,cypress ,00:24:A5:AD:61:4F,18dBm,70/70,-22dBm,n/a dBm,192.168.100.202*53