EHS6 quick start-up / power saving / start-up in airplane mode | Thales IoT Developer Community
July 7, 2014 - 9:31pm, 3825 views
Hi all,
I wonder if anybody can give some recommendations about how to minimise module start-up time and its power consumption.
Our application is intended to work like this:
1. External device wakes up the EHS6 using AUTO-ON level change.
2. EHS6 switches on and after about 6 seconds I get "^SYSLOADING" followed shortly by "^SYSTART". After 30 seconds the URC "+PBREADY" is output and the module is ready to do something.
3. In our case we just want to connect to another RS232 device to extract data. There is no need for the module to have it's RF circuits on and talk to the network as that just wastes battery power.
My question:
1. What is the best way to achieve the above?
2. Is there a way to make the module start in Airplane Mode? I can't seem to find that info in the documentation. I have seen the AT+CFUN=4 command. Does the module keep this state after a power-cyle?
Many thanks for any help,
Micha
Jul 8 2014 - 2:23pm
Hello,
you can use AT+CFUN=4 to configure airplane mode. This parameter is non volatile so it remains persistent until changed.
You don't have to wait for +PBREADY if you don't need to perform network activities. This URC informs that SIM authentication has been finished and SIM card and phonebooks may be accessed. The module is operational after ^SYSSTART URC.
To speed up shutdown you can configure fast shutdown functionality. According to HID fast shutdown procedure still finishes any data activities on the module's flash file system, thus ensuring
data integrity, but will no longer deregister gracefully from the network, thus saving the time required
for network deregistration.
Regards
Jedrzej
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