this SIM5218 AT command manual - Cooking Hacks

SIM5218 Serial AT Command Set
12.9 AT+CWIIC Write values to register of IIC device
Description
Write values to register of IIC device.
SIM PIN
NO
References
Vendor
Syntax
Test Command
AT+CWIIC=
Write Command
AT+CWIIC=
,,,
Responses
OK
Responses
OK
ERROR
Defined values
Device address. Input format must be hex, such as 0xFF.
Register address. Input format must be hex, such as 0xFF.
Read length. Range: 1-4; unit: byte.
Data written. Input format must be hex, such as 0xFF – 0xFFFFFFFF.
Examples
AT+CWIIC=0x0F, 0x0F, 0x1234, 2
+CWIIC: 0x1234
OK
12.10 AT+CVAUXS Set state of the pin named VREG_AUX1
Description
The command is used to set state of the pin which is named VREG_AUX1.
SIM PIN
NO
References
Vendor
Syntax
SIM5218_Serial _ATC_V1.36 243
5/15/2012