SIM800 Upgrade

• 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

• firmware 1418B07SIM800C24_BT
• flash tool SIM800_Series_download_Tools_Customer_v1.23/
• all you can find at https://github.com/Edragon/SIMCOM_SIM800-upgrade

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