Possible to lower current consumption while using SIM800 with MQTT?

GSM/GPRS Modules
#1

Hello,

I am going to design a mobile testing device, which uses a SIM800 GSM/GPRS Module. It has a 5000mAh Lithium battery which poweres everything. I am using MQTT to send / receive data from the device.

Now I would like to know if anyone has an idea how to lower the current consumption, is it somehow possible to put the module in a sleep mode, but the GPRS connection stays alive, so that it can receive a TCP message and wake up fully again? I mean a standard mobile phone, is switched on all day long, and is receiving whatsapp / facebook messages which also uses MQTT and the current consumption is less than the SIM800.

Would be very nice if I could get some hints :slight_smile:

Than ks!

#2

HI Mani,
The current consumption is around 10 to 13 mA when a TCP connection is open on the module. If you send data using CIPSEND, it jumps to around 50mA-60mA momentarily and comes back to 10 to 13mA.

I havent seen module entering sleep mode when connection active. Most of the time i keep module in active state so that i dont have delay in exiting from sleep in TCP mode.
You can try to enter module into sleep mode and see and share results to the community.

#3

Hello Ravi, thank you very much!

I am going to test this, and share my test results.