819 dual sim auto-switch 3G / GSM

[Mohamed ElHoussini]

hello,

the basic idea of 819 dual sim is that the router will change the activated sim to the other one when the signal is died (failover)

i want to creat an EEM applet that helps to switch to the other sim when the current band is GSM and test the signal in the switched one if it's WCDMA

it will be the activated one

i think we have to use the below coomands in the applet

1- check rssi

show cellular 0 radio

a) wcdma signal

Radio power mode = ON

Current Band = WCDMA 2100, Channel Number = 10612

Current RSSI = -74 dBm

Band Selected = Auto

Number of nearby cells = 1

Cell 1

        Primary Scrambling Code = 0x14E

        RSCP = -78 dBm, ECIO = -9 dBm

  b) gsm signal

Current Band = GSM 900, Channel Number = 61

Current RSSI = -94 dBm

Band Selected = Auto

Number of nearby cells = 1

Cell 1

        Primary Scrambling Code = 0x172

        RSCP = -105 dBm, ECIO = -6 dBm

2- to change the activated sim

cellular 0 gsm sim activate slot [0/1]

thnks in advance

[Joe Clarke]

What type of signal test are you looking for?

[Mohamed ElHoussini]

i want  the router to switch automatically when the signal is 2G (GSM) to the other SIM if its signal is (WCDMA)

a) wcdma signal

Radio power mode = ON

Current Band = WCDMA 2100, Channel Number = 10612   <---------------- the required one

Current RSSI = -74 dBm

Band Selected = Auto

Number of nearby cells = 1

Cell 1

        Primary Scrambling Code = 0x14E

        RSCP = -78 dBm, ECIO = -9 dBm

  b) gsm signal

Current Band = GSM 900, Channel Number = 61

Current RSSI = -94 dBm

Band Selected = Auto

Number of nearby cells = 1

Cell 1

        Primary Scrambling Code = 0x172

        RSCP = -105 dBm, ECIO = -6 dBm

[Joe Clarke]

Right, but I'm not sure what you mean by test the signal.  That would imply some kind of threshold.  I'm also not sure how to determine what the active SIM slot is, or how to see what the other SIM band is.  One unidirectional way to do what you want would be something like:

event manager applet watch-wcdma

event timer watchdog time 60

action 001 cli command "enable"

action 002 cli command "show cell 0 radio"

action 003 regexp "Current Band = (GSM|WCDMA)" $_cli_result match band

action 004 if $_regexp_result eq 1

action 005  if $band eq "GSM"

action 006  cli command "cellular 0 gsm sim activate slot 1"

action 007  end

action 008 end

[Mohamed ElHoussini]

great !

-the best signal is WCDMA compared with GSM  (regaldess the strenth of RSSI )

-to determine the active slot we can use the below command

  show cellular 0 all | i SIM

which results

Configured default profile for active SIM 0 is profile 1.

Active SIM = 0  <------------------------------------------------------------- the active slot

SIM switchover attempts = 0

SIM Status = OK

SIM User Operation Required = None

Copy-to-SIM Status =     0x0

[Joe Clarke]

Is there a way, then, to see what band the non-active SIM has selected?  If not, then the applet would just keep bouncing between the two if neither could select WCDMA.

[Mohamed ElHoussini]

there is no way to test the non-active sim ! so you are totally right

but can you adjust the applet to do its action every 1 hour so if it siwtched to the other sim and it was GSM too it wouldn't switch to the first unless the timer reached to zero ?!!

[Joe Clarke]

Then in that case, you could do:

event manager applet watch-wcdma

event timer watchdog time 3600

action 001 cli command "enable"

action 002 cli command "show cell 0 radio"

action 003 regexp "Current Band = (GSM|WCDMA)" $_cli_result match band

action 004 if $_regexp_result eq 1

action 005  if $band eq "GSM"

action 006  cli command "show cell 0 all | inc SIM"

action 007  regexp "Active SIM = ([0-9])" $_cli_result match slot

action 008  if $slot eq 1

action 009   cli command "cellular 0 gsm sim activate slot 0"

action 010  else

action 011   cli command "cellular 0 gsm sim activate slot 1"

action 012  end

action 013  end

action 014 end