Ubiquiti M radio - Revision history

Bryan at 19:35, 7 June 2021

2021-06-07T19:35:21Z

Bryan at 19:15, 7 June 2021

2021-06-07T19:15:30Z

Bryan at 19:15, 7 June 2021

2021-06-07T19:15:21Z

Bryan: /* Reset Circuit */

2021-06-07T19:14:48Z

Reset Circuit

Bryan: /* Reset Circuit */

2021-06-07T14:12:46Z

Reset Circuit

Bryan: Created page with "HamWAN Tampa uses the M3 and M5 radios for backhaul. = Serial port = J1 is serial port and takes a 4 pin .010 header. 115200, 8N1 is the port speed. Output is only at boo..."

2021-06-07T13:54:25Z

Created page with "HamWAN Tampa uses the M3 and M5 radios for backhaul. = Serial port = J1 is serial port and takes a 4 pin .010 header. 115200, 8N1 is the port speed. Output is only at boo..."

New page

HamWAN Tampa uses the M3 and M5 radios for backhaul.

= Serial port =

J1 is serial port and takes a 4 pin .010 header. 115200, 8N1 is the port speed. Output is only at boot.

Top = pin1
Pin 1 = 3.3v
Pin 2 = serial data RX (from PC to Radio)
Pin 3 = Serial Data TX (from Radio to PC)
Pin 4 = Ground

U-Boot 1.1.4.2-gd9d730c7 (Feb 14 2020 - 10:52:59)

DRAM: 64 MB
Flash: 8 MB
PCIe WLAN Module found (#1).
Net: eth0, eth1
Board: Ubiquiti Networks XM board (rev 1.0 e1c3)
Hit any key to stop autoboot: 0
## Booting image at 9f050000 ...
Image Name: MIPS Ubiquiti Linux-2.6.32.71
Created: 2020-07-15 13:58:30 UTC
Image Type: MIPS Linux Kernel Image (lzma compressed)
Data Size: 1034643 Bytes = 1010.4 kB
Load Address: 80002000
Entry Point: 80002000
Verifying Checksum ... OK
Uncompressing Kernel Image ... OK

Starting kernel ...

Booting...

= Reset Circuit =

There is a reset circuit which can be activated via the Ethernet cable. This can be disabled in the firmware, however, this still is active at boot and can put the radio into a bootloader mode. This causes the radio to come up at 192.168.1.20 and expect firmware via TFTP.

This is activated by a >15v potential on the Ethernet data lines with respect to ground. As this is totally non-standard and violates the balanced nature of the Ethernet system, it's possible to have this happen due to leakage voltage across the Ethernet.

Removing D903 completely disables this.

← Older revision		Revision as of 19:35, 7 June 2021
Line 47:		Line 47:

	[[File:M3 radio board showing diode moved.jpg\|thumb\|center\|M3 radio board showing diode moved]]		[[File:M3 radio board showing diode moved.jpg\|thumb\|center\|M3 radio board showing diode moved]]
		+
		+	https://pinoutguide.com/Net/poe_pinout.shtml

← Older revision		Revision as of 19:15, 7 June 2021
Line 1:		Line 1:
−	[[Category::UBNT]]	+	[[Category:UBNT]]
	HamWAN Tampa uses the M3 and M5 radios for backhaul.		HamWAN Tampa uses the M3 and M5 radios for backhaul.

← Older revision		Revision as of 19:15, 7 June 2021
Line 1:		Line 1:
		+	[[Category::UBNT]]
	HamWAN Tampa uses the M3 and M5 radios for backhaul.		HamWAN Tampa uses the M3 and M5 radios for backhaul.

← Older revision		Revision as of 19:14, 7 June 2021
Line 42:		Line 42:

	[https://dren.dk/mreset.html Flemming Frandsen has a good description] of the circuit on his page. Note that the part designations he uses are different than what's really on the board.		[https://dren.dk/mreset.html Flemming Frandsen has a good description] of the circuit on his page. Note that the part designations he uses are different than what's really on the board.
		+
		+	[[File:M3 radio board showing diode.jpg\|thumb\|center\|M3 radio board showing diode]]
		+
		+	[[File:M3 radio board showing diode moved.jpg\|thumb\|center\|M3 radio board showing diode moved]]

← Older revision		Revision as of 14:12, 7 June 2021
Line 39:		Line 39:
	This is activated by a >15v potential on the Ethernet data lines with respect to ground. As this is totally non-standard and violates the balanced nature of the Ethernet system, it's possible to have this happen due to leakage voltage across the Ethernet.		This is activated by a >15v potential on the Ethernet data lines with respect to ground. As this is totally non-standard and violates the balanced nature of the Ethernet system, it's possible to have this happen due to leakage voltage across the Ethernet.

−	Removing D903 completely disables this.	+	Removing D903 completely disables this. I move it aside and then use some lackor to secure it in the radio, just in case it's needed again.
		+
		+	[https://dren.dk/mreset.html Flemming Frandsen has a good description] of the circuit on his page. Note that the part designations he uses are different than what's really on the board.