ODROID ESP12E Smart Power 2 with 15V 4A Adapter Instruction Manual

: June 5, 2024
: ODROID

Table of Contents

Android Smart Power 2 – How to use
Receiving Power Data via micro USB cable
Hardware
Documentation
Software
Windows
Build Firmware
**PlatformIO
Troubleshooting
F/W Version History
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

ESP12E Smart Power 2 with 15V 4A Adapter
Instruction Manual

Android Smart Power 2 – How to use

Connect 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)

Output Power ON/OFF
You can turn the output power on/off using the tact switch on SmartPower2
Power monitoring with 16×2 LCD
We recommend connecting the LCD after disconnecting the main power source.

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+

WiFi Connection
Default SSID: smartpower2, Password: 12345678
Access Web UI
Default web server IP: 192.168.4.1
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.
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)

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

Connect your SmartPower2 to your PC via micro USB cable
Run Serial serial console programs like putty or minicom
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

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

Hardware

Documentation

Schematic

SmartPower2

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

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

Upload the Firmware
Simple instruction for Firmware upload.
Linux

Install the requirements
$ Sudo apt install python-pip git
$ Sudo pip install esptool
Get the binaries about firmware and web source
$ git clone https://github.com/hardkernel/smartpower2.git
$ cd smartpower2
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.

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.
Download and extract the flash tool flash_download_tools_v3.6.6_0.zip
Run the exe file into the folder
Select ESP8266
Start upload
You have to input binaries and other parameters as shown below picture. COM port is variable depending on your PC environment.

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

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 bar Add https://arduino.esp8266.com/stable/package_esp8266com_index.json into “Additional Boards Manager URLs” 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. Select “Tools → board” to “NodeMCU 1.0 (ESP-12E Module)”
Get source code
Download the latest source code.
v1.6-arduino.zip
Unpack and open the “smartpower2.ino” in Arduino Configure your Sketchbook location to your project root folder. (In my case $HOME/Downloads/smartpower2-1.4) Restart Arduino IDE. Then, you can see “ESP8266 Sketch Data Upload” on the tools menu bar.
Compile and upload
Run upload! Run “ESP8266 Sketch Data Upload” on the tools menu bar.

**PlatformIO

Linux

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
Get source code
Sudo apt-get install git
git clone https://github.com/hardkernel/smartpower2.git -b v1.6-platformio
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

Install platformIO
http://docs.platformio.org/en/stable/installation.html
Get source code
v1.6-platformio.zip
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 functionsqrt’:
/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

| 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

Fix the “ISR, not in IRAM” error: https://github.com/hardkernel/smartpower2/commit/03741a6fb96f5e2b64f3f342e8ed324136e78ea3

Release Note of F/W v1.5

Add the Arduino branch
Fix build flags on the platform: https://github.com/hardkernel/smartpower2/commit/998e002d1c4520b54701307dd60f841c9bf58f63

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

console logging with telnet
Assign a Unique SSID on each device for using multiple SmartPower2s simultaneously.