https://wiki.8devices.com/ 2026-08-04T15:54:01+03:00 https://wiki.8devices.com/ https://wiki.8devices.com/lib/tpl/8dev-bs/images/favicon.ico text/html 2022-04-04T16:28:17+03:00 https://wiki.8devices.com/carambola:1:demo_projects:control_plasma_tv Connect * Connect your TV to Carambola using serial cable * Setup your TV to known ID. To do this, use your remote. * Press MENU, select SPECIAL * Select Set ID * Adjust ID from 1 to 99. I left default, which is 1. Setup carambola * Setup Carambola network. (I used Wireless as client (STA) mode). In this mode Carambola connects to my WIFI router automatically. * Install picocom to carambola text/html 2022-04-04T16:28:16+03:00 https://wiki.8devices.com/carambola:1:demo_projects:graphic_color_lcd About This topic covers simple way to interface with LCD display. For this tutorial I am using cheap (under 20$) serial 2.2" display. Connection Connection is more than simple - no soldering or electronics skills are required. See picture: * LCD_SCL -> GPIO7 * LCD_SDA -> GPIO13 * LCD_CS -> GPIO9 * LCD_RST -> GPIO11 * LCD_RS -> GPIO12 text/html 2022-04-04T16:28:16+03:00 https://wiki.8devices.com/carambola:1:demo_projects:ht1632 About This article covers how to connect HT1632 LED driver to Carambola using only it's own peripherals and how to display real-time clock. Schematics I have used my own custom made board to drive LED's, but there are some popular options in ebay (just enter "HT1632") if you do not wish to make PCB's and solder (though code will drive circuit, but you have to adjust a bit). In my case it was a bit challenging because of small (2x2cm) LED matrix. Anyway, there is schematics. text/html 2022-04-04T16:28:17+03:00 https://wiki.8devices.com/carambola:1:demo_projects:i2c_in_python Setup At compile time add "python-smbus" package. Example Let's read acceleration data from LIS302L accelerometer: from smbus import SMBus bus = SMBus(0) addr = 0x1d # enable the accelerometer by setting CTRL_REG_1 (0x20) appropriately bus.write_byte_data(addr, 0x20, (0b0100 << 4 | 0b0111)) while True: print bus.read_byte_data(addr, 0x29) # print x axis text/html 2022-04-04T16:28:16+03:00 https://wiki.8devices.com/carambola:1:demo_projects:led_from_web_page Hardware Connect LED between GND and GPIO9 (CTS) pins. Prepare firmware Don't install LUCI (or set different server port number in lighthttpd.conf) Languages PHP php5 php5-fastcgi php5-mod-json php5-mod-sockets Network Web Servers/Proxies lighttpd lighttpd-mod-cgi lighttpd-mod-fastcgi lighttpd-mod-simple-vhost On Carambola Firewall Edit wan zone, to allow incoming connections. text/html 2022-04-04T16:28:16+03:00 https://wiki.8devices.com/carambola:1:demo_projects:m25p64_flash About This article covers how to connect serial SPI flash memory to your Carambola. I use M25P64 flash memory in this case which is 8MB. Connecting Building firmware * Get latest OpenWrt repository and build freshly. * Enter make menuconfig and enable * Kernel modules * SPI Support * kmod-spi-dev text/html 2022-04-04T16:28:16+03:00 https://wiki.8devices.com/carambola:1:demo_projects:pcf8575 This topic covers how to connect I2C device to Carambola. For this tutorial I will use PCF8575 16 bit I/O expander. In order to connect I2C device I will need few passive components. See attached schematics. There is also power selection jumper (5V or 3.3V) and SPI pin header. Discard these for this subject. text/html 2022-04-04T16:28:17+03:00 https://wiki.8devices.com/carambola:1:demo_projects:robot1 It is very simple demonstration how to use Carambola as rover platform with video feedback. It could be nice toy to build in couple of hours. I used very simple hardware setup. Key components are motor controller, 47:1 gearmotors, wheels, UVC webcam supported by mjpg_streamer and of course Carambola. text/html 2022-04-04T16:28:17+03:00 https://wiki.8devices.com/carambola:1:demo_projects:weather_station This topic demonstrates how to connect TFA dostmann Nexus wireless weather station (datasheet) to carambola and to upload data to remote server. Other weather stations that possible can be supported (but not tested): Hideki, Nexus, Mebus, Irox, Honeywell, Cresta TE923, TE923W, TE821W, WXR810, DV928, TE831X, IROX PRO-X USB