2ABU6-G1

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Revision as of 15:46, 21 July 2021 by Xopr (talk | contribs) (added ssh, uart and troubleshoot info)
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Project: 2ABU6-G1
Featured: Yes
State Active
Members User:Da Syntax, User:Xopr
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Description Minew BLE/Wifi Gateway
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A.K.A. Minew, MS93MFZ_V1.0, MS93MF6_V1.2, MT7628, Thingoo, 2ABU6-G1 Thanks to Monadnock for a lot of the pin labels

connecting UART

/!\ don't connect PoE and UART, you will fry the main board; there is a 43v difference in ground planes.

use 3.3V logic to be safe

For best results (prevent console glitches and boot loops), disconnect UART VIN and connect regular (micro) USB power

Run terminal client in 56k 8N1: minicom -D/dev/ttyUSB0 -b57600 -o And make sure Hardware Flow Control is off: Ctrl+a, o, choose Serial port setup, f

install secure shell daemon

gain root access by #updating firmware and run the following:

opkg update
opkg install openssh-server
vi /etc/ssh/sshd_config

make sure PermitRootLogin yes is set for (ch)easy login

/etc/init.d/sshd restart

updating firmware

  • login to the router (http)
  • go to tab Other (the last tab)
  • scroll to FIRMWARE UPGRADE
    • either choose USB and put the firmware as thingoo-upgrade.bin on the root of a USB stick
    • or choose put the firmware on a (local) webserver and fill in its URL

troubleshooting

ModemManager

Some Linux distro's hijack the serial port for modem usage; when you're experiencing problems, try and disable the ModemManager service:

systemctl disable ModemManager.service
systemctl stop ModemManager.service

Hardware flow control

If your serial is working intermittently, make sure Hardware flow control is off; for minicom it's: Ctrl+a, o, choose Serial port setup, f

If your terminal glitches or if you have boot loops, make sure you have a proper power supply and don't mix several supplies (i.e. PoE, USB, UART)

pins and connectors

J1

SoM row near the UART (J8) header

  1. USB D-
  2. USB D+
  3. GND
  4. SD_D2 (MDI_TN_P4)
  5. SD_D3 (MDI_TP_P4)
  6. SD_CMD (MDI_RN_P4)
  7. SD_CLK (MDI_RP_P4)
  8. SD_CD (MDI_TN_P3)
  9. SD_WP (MDI_TP_P3)
  10. SD_D0 (MDI_RN_P3)
  11. SD_D1 (MDI_RP_P3)
  12. ETH TXON0 (MDI_TN_P0)
  13. ETH TXOP0 (MDI_TP_P0)
  14. ETH RXIN0 (MDI_RN_P0)
  15. ETH RXIP0 (MDI_RP_P0)
  16. GND
  17. UART_RXD0 (GPIO#13)
  18. UART_TXD0 (GPIO#12)
  19. PWM_CH0 (GPIO#11, testpoint T11)

J1

SoM row near the SD card slot

  1. I2C_SD (GPIO#5)
  2. I2C_SCLK (GPIO#4)
  3. I2S_CLK (GPIO#3)
  4. I2S_WS (GPIO#2)
  5. I2S_DO (GPIO#1)
  6. I2S_DI (GPIO#0)
  7. GND
  8. UART_RXD1 (GPIO#46)
  9. UART_TXD1 (GPIO#45)
  10. WLED_N (GPIO#44)
  11. LINK0 LED1 (GPIO43, active high)
  12. LINK3
  13. LINK4
  14. WPS_RES_PBC
  15. REF_CLKO (GPIO#38)
  16. GND
  17. GND
  18. VDD (3.5v, testpoint T2)
  19. VDD (3.5v, testpoint T2)

J8

UART, presumably 3.3v

  1. Vin (tied to U10-8, EML3276 near SW2, also to testpoint DC4.5V=T20 via switch J13 in on-position)
  2. RxD
  3. TxD
  4. GND

J12

related to nRF52

  1. GND
  2. V (3.3v, same potential as T23)
  3. D ?
  4. C ?
  5. Reset?

CON1

IPEX/UFL for Bluetooth, connected to the middle antenna

CON2

Ribbon connector to WS2812 LEDs, flip up to release

also see