Getting Started with M2M

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Revision as of 04:04, 24 March 2021 by Dangku (talk | contribs) (Prepare)
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Overview: BPI-M2M ubuntu linux
  Banana Pi M2M is another ARM SoC powered development board that offers great computing performance in an ultra portable form factor. It is a 51mm square with Allwinner A33 Quad-core A7 SoC and 512MB DDR3 RAM. 

Key Features

  • Quad Core ARM Cortex A7 CPU. R16
  • 512MB DDR3 SDRAM
  • WiFi (AP6212) & Bluetooth onboard




1. Prepare 8G/above TF card, USB-Serial interface.
2. Connect USB-Serial to 40 pin header uart2 for kernel console debug.
Note: three pin header uart0 beside usb port is not debug uart for bpi release images because SDcard and uart0 are multiplex pin and default bpi images support both SD and eMMC. If you want bootup with emmc only and enable uart0 as debug port without SDcard support, please refer to enable uart0 debug for emmc only image section.
 M2M debug console.png  M2M pin define.png
3. Install bpi-tools on your Linux PC, If you can't access this URL or any other problems, please go to bpi-tools repo and download this tools manually.
 $ apt-get install pv
 $ curl -sL | sudo -E bash
4. Download latest linux image, and confirm that the md5 checksum is correct.
5. Defautl login: pi/bananapi or root/bananapi.

Install Image to SDcard

1. Install image with bpi-tools on Linux, plug your sd card to your Linux PC
   $ sudo bpi-copy /dev/sdX
2. Install image with dd command on Linux, umount SDcard device /dev/sdX partitions if mounted automatically, Actually bpi-copy is the same as this dd command.
   $ sudo apt-get install pv
   $ sudo unzip -p | pv | dd of=/dev/sdX bs=10M status=noxfer
3. Install bpi image with Etcher on Windows, Linux and MacOS
Balena Etcher is an open source project by Balena, Flash OS images to SD cards & USB drives

Install Image to EMMC

1. Prepare a SDcard with Linux image flashed and bootup the board with this SDcard.
2. Copy emmc image to udisk, plugin the udisk to board and mount it.
3. Install with bpi-tools command
   $ sudo bpi-copy /dev/mmcblk1
4. Or Install with dd command, umount mmcblk1p1 and mmcblk1p2 partition if mounted automatically, Actually bpi-copy is the same as this dd command
   $ sudo apt-get install pv
   $ sudo unzip -p | pv | dd of=/dev/mmcblk1 bs=10M status=noxfer
5. After flash complete, power off safely and eject the sdcard.

Note: If the emmc was flashed android image before, you must erase the boot partition of android before step 3 or step 4.

   root@bpi-iot-ros-ai:/# echo 0 > /sys/block/mmcblk1/mmcblk1boot0/force_ro                              
   root@bpi-iot-ros-ai:/# echo 0 > /sys/block/mmcblk1/mmcblk1boot1/force_ro                              
   root@bpi-iot-ros-ai:/# dd if=/dev/zero of=/dev/mmcblk1boot0 bs=4096 count=1024                        
   1024+0 records in
   1024+0 records out
   4194304 bytes (4.2 MB, 4.0 MiB) copied, 0.421164 s, 10.0 MB/s
   root@bpi-iot-ros-ai:/# dd if=/dev/zero of=/dev/mmcblk1boot1 bs=4096 count=1024                        
   1024+0 records in
   1024+0 records out
   4194304 bytes (4.2 MB, 4.0 MiB) copied, 0.428427 s, 9.8 MB/s

Build Source Code

1. Get the bsp source code
 $ git clone
2. Build the bsp source code
Please read the source code

Advance Development

Enable uart0 for emmc only image debug

1. Enable uart0 node and disable sdc0 node in sunxi-pack/sun8iw5p1/configs/BPI-M2M-LCD7/sys_config.fex.
    --- a/sunxi-pack/sun8iw5p1/configs/BPI-M2M-LCD7/sys_config.fex
    +++ b/sunxi-pack/sun8iw5p1/configs/BPI-M2M-LCD7/sys_config.fex
   @@ -262,7 +262,7 @@ twi_sda         = port:PE13<3><default><default><default>
    ;uart_type       = 2:2 wire,4:4 wire,8:8 wire, full function
   -uart_used       = 0
   +uart_used       = 1
    uart_port       = 0
    uart_type       = 2
    uart_tx         = port:PF02<3><1><default><default>
   @@ -803,7 +803,7 @@ led3_active_low             = 1
    ;     that supports SD3.0 cards and eMMC4.4+ flashes
   -sdc_used          = 1
   +sdc_used          = 0
    sdc_detmode       = 3
    sdc_buswidth      = 4
    sdc_d1            = port:PF00<2><1><2><default>
2. Build the bsp source code.
3. Copy the bootloader file SD/bpi-m2m/100MB/BPI-M2M-LCD7-8k.img.gz to udisk. bpi also provide a prebuild bootloader for this requirement.
4. Bootup the m2m board from emmc, plugin the udisk and mount it.
5. Flash the bootloader to emmc
   $ sudo bpi-bootsel BPI-M2M-LCD7-8k.img.gz /dev/mmcblk0
   $ sudo gunzip -c BPI-M2M-LCD7-8k.img.gz | dd of=/dev/mmcblk0 bs=1024 seek=8
   $ sync
   $ sudo umount /dev/sda1
6. Mout boot partition and set kernel debug console in uEnv.txt
   $ sudo mount -t vfat /dev/mmcblk0p1 /mnt
Change "console=ttyS2,115200" to "console=ttyS0,115200" in /mnt/bananapi/bpi-m2m/linux/lcd7/uEnv.txt
   $ sudo umount /dev/mmcblk0p1
7. Safely poweroff the board and connect debug uart to uart0 three pin header.

Audio Path

1. 2-pin HP header output audio path
2-pin HP header output audio path
Number id Ctl_name value
1 headphone volume 0-63
104 AIF1IN0L Mux AIF1_DA0L
103 AIF1IN0R Mux AIF1_DA0R
100 DACL Mixer AIF1DA0L Switch 1
96 DACR Mixer AIF1DA0R Switch 1
78 HP_R Mux DACR HPR Switch
77 HP_L Mux DACL HPL Switch
105 Headphone Switch 1
2. Mic 1 input audio path
Mic 1 input audio path
Number id Ctl_name value
51 AIF1 AD0L Mixer ADCL Switch 1
47 AIF1 AD0R Mixer ADCR Switch 1
34 LEFT ADC input Mixer MIC1 boost Switch 1
27 RIGHT ADC input Mixer MIC1 boost Switch 1
4 MIC1 boost amplifier gain 0-7
3.Alsa configuration file /var/lib/alsa/alsa.state.bpi-m2m already enable 2-pin HP output and Mic 1 input audio path, and restore by /var/lib/bananapi/bpi-autorun.d/ after system bootup.


  • Use bluetoothctl tool to operate BT
  • Execute "bluetoothctl"
  • If you don't know how to use bluetoothctl, type "help", you will see more commands
  • Execute these commands:

M2M BT bluetoothctl.png

WiFi Client

You have two ways to setup WiFi Client

1. Use commands to setup WiFi client

 $ sudo su
 # killall wpa_supplicant
 # wpa_passphrase <ssid> <passphrase> > /etc/wpa_supplicant/wpa_supplicant.conf              
 # ifconfig wlan0 up
 # iwlist wlan0 scan
 # wpa_supplicant -B -iwlan0 -c/etc/wpa_supplicant/wpa_supplicant.conf
 # dhclient eth0

There are some other command line ways, please google for them.

2. Use UI interface to setup WiFi Client

Camara function

We use HDF5640 camara.

Ov5640 camara.png


  • Use your UI interface to operate camara
  • Applications -> Sound & Video -> guvcview


  • We also have built-in command in /usr/local/bin to test camara
  • "./" to test picture taking function
  • "./" to test video recording function


Install RPi.GPIO

  • Execute "git clone"
  • after clone the repo, cd RPi.GPIO
  • Execute "sudo apt-get update"
  • Execute "sudo apt-get install python-dev python3-dev"
  • Execute "sudo python install" or "sudo python3 install" to install the module

Using RPi.GPIO

  • cd /usr/local/bin
  • Execute "./" to test RPi.GPIO

RPi GPIO.png


How to Update WiringPi

  • Execute "bpi-update -c pkglist.conf"

Update Pkglist.png

  • Execute "bpi-update -c bpi-pkg-bpi-wiringpi.conf"

Update WringPi.png

RGB 1602 LCD

  • Execute "/usr/local/bin/"

WringPi 1602 LCD m2m.png

0.96 Inch OLED Display

  • Execute "/usr/local/bin/"

8x8 RGB LED Martix

  • Firstly you need a GPIO Extend Board for 8x8 LED Martix

WringPi LED Martix Extend Board.png

  • Execute "/usr/local/bin/"

WringPi LED Martix m2m.png