SIM800 Upgrade

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  • Normal SIM800 non-bluetooth can be upgrade to bluetooth version
  • the module type silk print is S2-1068S-ZIL1D
  • you can also upgrade other simcom modules or customized software by the same

before is

AT+GMR
Revision:1418B07SIM800C24

after is

AT+GMR
Revision:1418B07SIM800C24_BT

and bluetooths is working fine

Files

wiring

Wiring is VBAT, GND, TXD and RXD, usb-ttl adapter use CH340, speed up to max. here 900K

Mode select

  • for flash, hold down pwrkey then power ON (attach the test-pin), up to 20 seconds
  • for normal boot, power ON first (attach the test-pin) then hold down pwrkey up to 3 seconds