2ABU6-G1

Project: 2ABU6-G1
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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 V_IN 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

• product page
• Monadnock consultancy community blog
• FCC entry
• reference designs compared to the FCC internal pictures and Monadnock's pinout