Hardware

• Debug-UART
• power-on: hold power-switch 10 seconds, without power-switch: Forum
  • solder bridge next to power switch. Can cause problems since poweroff-feature. To fix this blacklist pmic-keys-module or uninstall acpid package see issue 35
  • input 5V to OTG
• poweroff (4.14.53+) needs acpid package for power-button (command works without it)
  • http://forum.banana-pi.org/t/bpi-r2-already-has-an-on-board-rtc/5347/31
• emmc: Forum
  • emmc on v1.2 is maybe from vendor SEC which needs different pinctrl setting (pu/pd) in uboot to be recognized: forum issue was introduced in u-boot 2022.04 and fixed with patch from daniel (for 2023.07)
• wifi-chip onBoard: MT6625 Forum (dev) Forum (usr)
• Switch-Chip onBoard: MT7530 Forum
• GPIO

• Power-supply: 12V/2A recommended,plug coaxial: 2,1 x 5,5 mm Reichelt
• microSD-card (>=8GB): Sandisk Ultra 32GB
• WLAN-antennas: 5dBi mit rp-SMA auf IPEX/u-FL Kabel
• PCIe wifi-card: Forum ⇒ MT76
• case:
  • official: alu-case,acrylic case
  • inofficial files for 3D Printer
• heatsinks:
  • mt7623: 20x20mm
  • mt7530: 14x14mm (like rpi soc)

• rp-SMA to IPEX/u-FL cable for wifi-antennas

• 2,54mm XH 2pin/4pin for SATA power or 2-Pin combined with SATA

it works with GND next to power (1+2,3+4). 12V is yellow, 5V is red

both jacks near sata-connector have voltage, also if R2 is „halted“, the fan-jack (near IR-receiver) had no direct-current output in my tests (4.14), this seems my gnd there is broken…with another gnd i have the 5V output

• 1,25mm SH 6pin for battery AliExpress, no circuit known battery-connector does not work see here

• wifi mPCIe-card bolted with M2x10 screws and knurled nut + 2 x washers of Polyamid (isolation+protection of the board)