Difference between revisions of "Category:SIM908"

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== Schematic ==
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#redirect [[category: SIMCOM]]
<gallery>
 
File:SIM908C-Schematic.png|SIM908C DIP Board
 
File:SIM908 R1.5 Schematic.png | SIM908 Mini Board R1.5 schematic
 
File:SIM908-R1.5 Pin definition.png | SIM908 Mini Board R1.5 board pins
 
</gallery>
 
Pin functions
 
* Pin RI: can indicate the incoming call with a TTL signal, this can also connect to a MCU port, it is connected to Net1 onboard LED too.
 
* Board provide VCHG battery charge pin: as well as a temperature check pin for battery, when a lithium battery attach between pin VCHG and GND, it will be charged by a provided 4.2 volt.
 
 
 
== SIM908 Dev. Board ==
 
Configuration
 
{| class="wikitable sortable"
 
|-
 
! Name !! Description
 
|-
 
| SW101 || Power On/Off
 
|-
 
| GSM PORT || Serial (AT command input,GPRS data input)
 
|-
 
| GPS PORT || GPS debug test
 
|-
 
| LED D200 || Power indication LED
 
|-
 
| LED D201  || Working status indication LED
 
|-
 
| CN102 || USB Port
 
|-
 
| J103 || GSM Antenna Port
 
|-
 
| J100 || GPS Antenna Port
 
|}
 
 
 
Reference voltage test point
 
{| class="wikitable sortable"
 
|-
 
! Reference voltage test point !! Voltage
 
|-
 
| Test Point 1 || 3.3V
 
|-
 
| Test Point 2 || 5.0V
 
|-
 
| Test Point 3 || 4.0V
 
|-
 
| Test Point 4 || 2.8V
 
|}
 
 
 
=== SIM908 Mini Board ===
 
Status of On-board LEDs
 
{| class="wikitable sortable"
 
|-
 
! Name !! Description
 
|-
 
| Net1 || connect to pin RI, keep off when power on, will light on when there is an incoming call
 
|-
 
| Pwr || Power status LED, keep constantly on
 
|-
 
| Net || inform the network status, quick blink when network not yet registered or problematic, keep slowly blink when network registered.
 
|}
 
Updates
 
* Version 1.1: * Change main power LDO, may have better performance * Add extra power pins and Uart pins * Fit into a case design.
 
* Version 1.2: Add extra logic leveled UART pins for arduino or Raspbery Pi such 5V or 3v3 devices
 
 
 
== Documents ==
 
[[File:Pins definition 908.jpg|thumbnail]]
 
* General IC info and pin definition
 
* [[:File:SIM908 Hardware Design V1.06.pdf|SIM908_Hardware Design_V1.06]]
 
* [[:File:Sim908.pdf|Sim908 General Specification]]
 
* [[:File:SIM908 AT Command Manual V1.02.pdf|SIM908 AT commands 1.02]]
 
 
 
* [http://www.cadsoftusa.com/downloads/file/sim908.lbr Eagle Library link]
 
* [[:File:SIM908-EVB-Schematics.pdf|SIM908 EVB Schematics]]
 
Video tutorial
 
* [https://www.youtube.com/watch?v=NGR7T-sSNxA Power by USB cable]
 
* [https://www.youtube.com/watch?v=g_VaXmIKPg4 Power and controlled by Arduino.]
 
 
 
 
 
 
 
[[category: SIMCOM]]
 

Latest revision as of 23:48, 19 October 2017

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