ODROID LogoESP12E Smart Power 2 with 15V 4A Adapter
Instruction Manual

Contents hide
1 Android Smart Power 2 – How to use
2 Receiving Power Data via micro USB cable
3 Hardware
4 Documentation
5 Software
6 Windows
7 Build Firmware
8 PlatformIO
9 Troubleshooting
10 F/W Version History
11 Documents / Resources
11.1 References
12 Related Posts

Android Smart Power 2 – How to use

ODROID ESP12E Smart Power 2 with 15V 4A Adapter - FigConnect the included 15V/4A adapter and plug the output cable into the terminal block.
Ensure the DC plug cable is properly connected to the negative(black) and positive(red).
Caution! if you plug it the other way, your board will be seriously damaged.

Without WiFi (Standalone mode)

  1. Output Power ON/OFF
    You can turn the output power on/off using the tact switch on SmartPower2
  2. Power monitoring with 16×2 LCD
    We recommend connecting the LCD after disconnecting the main power source.ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 1

With WiFi (Connected mode)
The webpage supports IE 11+, Edge 13+, Firefox 47+, Chrome 49+, Safari 9.1+, Opera 41+, IOS Safari 9.3+, Android Browser 4.4+, Chrome for Android 53+

  1. WiFi Connection
    Default SSID: smartpower2, Password: 12345678
  2. Access Web UI
    Default web server IP: 192.168.4.1ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 2
  3. Home
    • Seven Segments: voltage, ampere, watt, watt-hour.
    • ON/OFF slide: Output power ON/OFF.
    • Start/Stop slide: Watt-hour measurement Start/Stop.
    • Voltage slider: Change output voltage.
    • Save Default Voltage button: Set default voltage.
  4. Settings
    • AutoRun checkbox – Output power ON/OFF automatically when you power on the SmartPower2.
    • Save Button – Save Network Configuration (SSID, IP Address, Password).
    • Reset Button – Initialize User Network Configuration (Factory reset) ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 3

With Telnet (Connected mode)
After connection with WiFi, you can get power data via telnet.
[Voltage],[Ampere],[Power],[Watt hour] $ telnet 192.168.4.1
5.255,0.451,2.374,0.000
5.256,0.451,2.374,0.000

Receiving Power Data via micro USB cable

This feature is available in F/W v1.4 or later.
You can receive power data(current, voltage, power, watt-hour) from your SmartPower2 to your PC or ODROIDs through serial.
The serial output is available only when the output power is enabled.
Requirement Parameters
• 115200bps 8N1
• no-flow-control

  1. Connect your SmartPower2 to your PC via micro USB cable
  2. Run Serial serial console programs like putty or minicom
  3.  Enable power-on

LED State

LED  State  Description 
PWR(D1) off Input power off
on Input power on
blink Output power on
WiFi Status off no WiFi connection
on WiFi connected
blink Webpage loaded

ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 4

System Reset
After boot, press the ON/OFF switch for 5 seconds to reset all settings including WiFi.

Hardware

ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 5

Documentation

Schematic

Data Sheet

  • MCU – ESP8266 Espressif low power 32-bit MCU
  • USB to UART – CP2104 single-chip USB-to-UART bridge
  • 3A 16V Stepdown – MP1495S High-Efficiency 3A, 16V, 500kHz Synchronous Step Down Converter
  • Digital Potential Meter – MCP4652 7/8-Bit Single/Dual I2C Digital POT with Volatile Memory
  • Current/Power Monitor – ina231 High- or Low-Side Measurement, Bidirectional CURRENT/POWER MONITOR with 1.8-V I2C Interface
  • 10A 18V Stepdown – MP8762 High Efficiency, 10A, 18V Synchronous Step-down converter

Software

ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 6

Framework – Arduino, Jquery
Build Platform – Platform, Arduino IDE

Upload the Firmware
Simple instruction for Firmware upload.
Linux

  1. Install the requirements
    $ Sudo apt install python-pip git
    $ Sudo pip install esptool
  2. Get the binaries about firmware and web source
    $ git clone https://github.com/hardkernel/smartpower2.git
    $ cd smartpower2
  3. Upload
    You should check your esp8266 serial number like “/dev/ttyUSB0” or “/dev/ttyUSB1”
    $ sudo esptool.py –chip esp8266 –port /dev/ttyUSB0 –baud 921600 write_flash 0x00000 prebuilt/firmware.bin 0x100000 prebuilt/spiffs.bin

Windows

The instructions were tested on Windows 10.

  1. Get the binaries about firmware and web source from this link https://github.com/hardkernel/smartpower2/releases then, you need to extract the zip file from your work folder.
  2. Download and extract the flash tool flash_download_tools_v3.6.6_0.zip
  3. Run the exe file into the folderODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 7
  4. Select ESP8266ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 8
  5. Start upload
    You have to input binaries and other parameters as shown below picture. COM port is variable depending on your PC environment.ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 9

Build Firmware

This guide is working with x86 platforms only. The development tools are not available for ARM platforms.
You can use Arduino IDE or PlatformIO to build the platform.
Arduino IDE

  1. Install Arduino IDE for ESP8266
    Download the Arduino IDE via this link
    https://www.arduino.cc/en/Main/Software
    Run Arduino IDE and open “File → Preferences” on the menu barODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 10 Add https://arduino.esp8266.com/stable/package_esp8266com_index.json into “Additional Boards Manager URLs”ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 11 After adding the URL, you are able to search “esp8266” in “Tools → Board → Boards Manager”.
    Install the esp8266 Android version 2.4.2!
    Currently, Smartpower2 is not compatible with version esp8266 Android v2.5.0 or higher.ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 12Select “Tools → board” to “NodeMCU 1.0(ESP-12E Module)”ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 13
  2. Get source code
    Download the latest source code.
    v1.6-arduino.zip
    Unpack and open the “smartpower2.ino” in ArduinoODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 14Configure your Sketchbook location to your project root folder. (In my case $HOME/Downloads/smartpower2-1.4)ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 15Restart Arduino IDE. Then, you can see “ESP8266 Sketch Data Upload” on the tools menu bar.ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 16
  3. Compile and upload
    Run upload!ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 17 Run “ESP8266 Sketch Data Upload” on the tools menu bar.ODROID ESP12E Smart Power 2 with 15V 4A Adapter - Fig 18

PlatformIO

Linux

  1. Install PlatformIO
    sudo apt-get install python-pip
    sudo pip install -U platformio
    platformio –version
    If you have any issues while installing it, refer to this guide.
    http://docs.platformio.org/en/stable/installation.html
  2. Get source code
    Sudo apt-get install git
    git clone https://github.com/hardkernel/smartpower2.git -b v1.6-platformio
  3.  Build & Upload Connect MicroUSB to Host PC.
    You can see the list of USB drivers “CP210x UART Bridge” by lsusb in the terminal.
    cd smartpower2
    sudo platformio run
    Sudo platformio run –target upload
    sudo platformio run –target uploads

Windows

  1. Install platformIO
    http://docs.platformio.org/en/stable/installation.html
  2. Get source code
    v1.6-platformio.zip
  3. Build & Upload
    Run CMD and move to the smartpower2 folder and Connect MicroUSB to Host PC.
    You can see the list of USB drivers “CP210x USB to UART Bridge(COMx)” on the Device Manager.
    cd /path/to/dir/smartpower2
    platformio run
    platformio run –target upload
    platformio run –target uploads

Troubleshooting

“undefined reference to sqrt” error
If you have any errors such as the following.
/home/kyle/.platformio/packages/toolchain-xtensa/bin/../lib/gcc/xtensa-lx106-elf/4.8. 2/../../../../xtensa-lx106-elf/lib/libm.a(lib_a-w_sqrt.o):(.literal+0x8): undefined r eference to `__ieee754_sqrt’=
/home/kyle/.platformio/packages/toolchain-xtensa/bin/../lib/gcc/xtensa-lx106-elf/4.8. 2/../../../../xtensa-lx106-elf/lib/libm.a(lib_a-w_sqrt.o): In function `sqrt’:
/xtensa/esp-open-sdk/crosstool-NG/.build/src/newlib-2.0.0/newlib/libm/math/w_sqrt.c:6 9: undefined reference to `__ieee754_sqrt’
collect2: error: ld returned 1 exit status
*** [.pioenvs/esp12e/firmware.elf] Error 1
Please try to replace the libm.a file in the “.platformio/packages/toolchain-xtensa/xtensa-lx106elf/lib/” after extract.
Refer to: https://github.com/esp8266/Arduino/issues/612

F/W Version History

Release Date

 Version Description

Git
Oct 11
2019		 v1.6

 

 Fix the “ISR, not in IRAM” error https://github.com/hardkernel/smartpower2/tree/v1.6-arduino

 
May 17
2019		 v1.5

 

 Add Arduino branch https://github.com/hardkernel/smartpower2/tree/v1.5-arduino

 
May 28
2018		 v1.4

 

 Add receiving power data function through serial https://github.com/hardkemel/smartpower2/tree/v1.4

 
February
12 2018		 v1.3 Fix compile errors
March 27
2017		 v1.2 Fix the LCD display of watt-hours, display volts, and amps to three decimal places on the web interface.
January
22 2017		 v1.1

 

 Add console logging with telnet and make SSID unique to each device https://github.com/hardkernel/smartpower2/tree/v1.1

 

F/W upload tutorials
Release Note of F/W v1.6

Release Note of F/W v1.5

Release Note of F/W v1.4

  • You can receive power data(current, voltage, power, watt-hour) from your SmartPower2
    through serial
  • How to use this

Release Note of F/W v1.1
Thanks to https://github.com/OtherCrashOverride
New features

Documents / Resources

ODROID ESP12E Smart Power 2 with 15V 4A Adapter [pdf] Instruction Manual
ESP12E Smart Power 2 with 15V 4A Adapter, ESP12E, Smart Power 2 with 15V 4A Adapter

References

Related Posts

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