This board has all the I/O peripherals needed to communicate with sensors, network (either through wifi or Ethernet), GSM network as well as a siren and a smaller beeper. The board also receives power from an external power supply and charges the battery. It also holds the SOM.
For development, see the Forlinx OKMX6UL-C1 Base Board or the Forlinx OKMX6UL-C2 Base Board
At least two different versions of the unit exists. We will try to keep the common parts here, and separate the differences in version specific pages.
| Y001 | Y005 | |
|---|---|---|
| GSM | SIM800C | SIM800C |
| WLAN | Realtek RTL8723BU | Realtek RTL8723BU |
| RF Radio | Princeton Technology PT4304-X (Receiver) | CMOSTEK CMT2210LB (Receiver) |
| RF Decoder? | STM32F103VC | Nuvoton NUC121LC2AE |
A SIM800C package is mounted on U5, providing GSM connectivity through ANT1. Needs to be enabled by setting GPIO 128?
A Realtek RTL8723BU package is mounted on U12, providing WLAN connectivity through ANT2. Needs to be enabled by lowering GPIO 132.
This information is recovered from /data/scripts/start/gpio_init.sh. Values marked default are the values explicitly set by the script, not the boot time defaults:
| GPIO | Direction | Description | Notes |
|---|---|---|---|
| 1 | out | Red LED | 0: (default) |
| 2 | out | Blue LED | 1: (default) |
| 3 | out | Green LED | 1: (default) |
| 4 | out | GSM DTR | |
| 8 | out | STM32 enabled | 0: no 1: yes (default) |
| 9 | in | Reset button | |
| 128 | out | GSM enable | 0: (default) |
| 129 | in | GSM discovery(?) | |
| 130 | out | mic | 1: (default) |
| 132 | out | WLAN enabled | 0: yes (default) 1: no |
| 135 | in | Wifi button(?) | |
| 136 | out | Intercom switch(?) | 1: (default) |
| 137 | in | SIM card inserted |
Define and get an input GPIO like this:
echo 9 > /sys/class/gpio/export
echo in > /sys/class/gpio/gpio9/direction
cat /sys/class/gpio/gpio9/value
Define and set an output GPIO like this:
echo 1 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio1/direction
echo 0 > /sys/class/gpio/gpio1/value