Hello.
This
time,
I’ll
show
you
how
a
professional IOT company uses the Intel Edison board to showcase its technology. ‘Teletron’ was established in 1993. The core areas of business are IP network, Wireless, and network based total solutions. The Headquarter and R&D are located in An Yang city of Gyeongi province in South Korea, and it has branch offices in USA and Taiwan. Teletron’s SDM or ‘Smart Device Management’ orchestrates smartphone, home appliances, industrial equipment and all kinds of devices. It enables efficient and comfortable use of those smart devices by firmware update and other intelligent functions. Teletron modified the solution to manage and control Intel Edison based IOT devices.
SDM is composed of server, device, and smartphone. Server enables a user to sign up for new device. It also supports functions that control, monitor, diagnose, firmware update and set up each device. The device is a product that can connect to the server through the data network such as Ethernet, WiFi and the mobile network of 3G, 4G or 5G. It includes software which supports the functions of SDM.
The smartphone app makes use of SDM interface which allows to control, monitor and perform other necessary functions for the smart devices.
For this demo, ‘Teletron’ uses Intel NUC as a server. All devices are Intel Edison based products. A smartphone connects to the local WiFi network through a wireless router.
I will explain briefly about the Intel Edison. Intel Edison is a module composed of Dual Core 500MHz Atom processor, 100MHz micro controller, 1GB RAM, 4GB flash, WiFi and Bluetooth. Intel provides 2 extra types of board to communicate with the Edison module through the 70-pin connector for power source, battery charge, serial monitor and various signals of input and output. One of them is ‘Intel Edison Board for Arduino’.
But, ‘Teletron’ selects the other one of ‘Intel Edison Breakout Board’ because it can minimize the size the device.
Breakout board has jumpers for Power source, GPIO, PWM and UART. Because of external AC Power for each device, 12V to the pin4 of jumper J17 is applied through the AC-DC converter in each device.
GPIO or ‘General Purpose Input Output’ controls input and output of digital signals. The voltage level of GPIO is from 0V to 1.8V and the maximum current ranges +/- 3mA, so you should design the circuitry with this in mind.
For this demo, ‘Teletron’ makes use of GPIO output for ‘2-outlet power strip’ device to manage the ‘Relay’ component in the device.
In case of ‘Lamp’ device, GPIO is used as input to detect the signal from switch to turn on and off every time we press it.
‘Teletron’ uses PWM or ‘Pulse width modulation’ for ‘Lamp’ device to control brightness. The pin1 of jumper17 is used for PWM signal.
Because its voltage level ranges from 0V to 1.8V and output current drives only +/- 3mA, the LED in the device cannot turn on and off. Therefore, ‘Teletron’ added the LED Driver.
UART or ‘Universal Asynchronous Receiver Transmitter’ is used to receive the value from ‘Analogto-Digital Convertor’ in the ‘Sensor’ device.
But we have added ‘Voltage level convertor’ to 3.3V and 1.8V because the voltage range of UART1_RX signal at the pin13 of jumper J18 is from 0V to 1.8V.