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Hardened Digipeater
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I am looking for a POR for a Raspberry Pi running Direwolf. ?I need to put a digipeater in a remote location to improve coverage back to the IGATE. ?What is anyone doing for a POR and maybe not flash memory to allow continuous operation. ?Then in a power failure the Raspberry pi can restart and get back to digipeating. ?This would reduce one portable digipeater we have to put in for bike events. ?
Tim KM4ESU? |
开云体育I'd go with a PiZero2W and a read-only filesystem.??? They run for years (observed).??I'd also get a radio with no moving parts, like a yaesu2980.? No relays, no fans, nothing. When it reboots or powerfails, it boots the exact same tested image it used on day one. I'm sure you'll get lots of other examples here too, I'm interested in your hardening aspect. imho, -craig KM6LYW On 11/29/21 11:47 AM, Tim Huffaker
wrote:
I am looking for a POR for a Raspberry Pi running Direwolf. ?I need to put a digipeater in a remote location to improve coverage back to the IGATE. ?What is anyone doing for a POR and maybe not flash memory to allow continuous operation. ?Then in a power failure the Raspberry pi can restart and get back to digipeating. ?This would reduce one portable digipeater we have to put in for bike events. ? |
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Lynn Deffenbaugh
On 11/29/2021 5:13 PM, Craig, KM6LYW wrote:
I'd go with a PiZero2W and a read-only filesystem.??? They run for years (observed).Just a curious question:? How have you "observed" a "PiZero2W" running "for years" when they were just released? Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32 |
开云体育Hello Tim, Can you define what a "POR" is?? Beyond that, there is lots of documentation out there to harden a Raspberry Pi to run for years though if you are going to have intermittent power issues, it's a must you put your commonly written-to file systems on a RAM drive and I'd also argue to have a battery backup with some automatic shutdown support.? There are several Raspberry Pi "UPS" HAT designs out there that can do this very effectively. --David KI6ZHD On 11/29/2021 11:47 AM, Tim Huffaker
wrote:
I am looking for a POR for a Raspberry Pi running Direwolf. ?I need to put a digipeater in a remote location to improve coverage back to the IGATE. ?What is anyone doing for a POR and maybe not flash memory to allow continuous operation. ?Then in a power failure the Raspberry pi can restart and get back to digipeating. ?This would reduce one portable digipeater we have to put in for bike events. ? |
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okay, a "Pi Zero", but I also expect great things from the Rpi02W :)
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On 11/29/21 3:14 PM, Lynn Deffenbaugh wrote:
On 11/29/2021 5:13 PM, Craig, KM6LYW wrote:I'd go with a PiZero2W and a read-only filesystem.??? They run for years (observed).Just a curious question:? How have you "observed" a "PiZero2W" running "for years" when they were just released? |
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Ahhh-HAHAHA ?? very clever ?
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On Nov 29, 2021, at 17:57, Craig, KM6LYW <craig@...> wrote: |
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ALPINE linux has good tools for managing read only file systems, so you can go to update mode, and then back to RO etc
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it is package manager aware. On 30/11/2021 12:52 pm, Jon Adams wrote:
Ahhh-HAHAHA ?? very clever ?On Nov 29, 2021, at 17:57, Craig, KM6LYW <craig@...> wrote: --
Glen English RF Communications and Electronics Engineer CORTEX RF Pacific Media Technologies Pty Ltd trading as Cortex RF ABN 40 075 532 008 PO Box 5231 Lyneham ACT 2602, Australia. au mobile : +61 (0)418 975077 |
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Somebody asked about POR. Point of reference I believe.
At this end a receive only i-Gate has been running for a couple of years on a RPi model A. The receiver being a RTL-Dongle and the set-up is located in the loft so protected from the elements. The OS is running RW but I haven't had any issues. More recently, I have added a separate Digi-peater/i-Gate combo using a RPi v4 (overkill I know) in a passive heatsink type case plus a Baofeng UV5RE. This is connected to a 2M beam pointing north which wasn't covered by other local digi-peaters. So a few thoughts to build up the POR. It sounds as if your digipeater is just that and isn't a combo (digipeater/i-gate) so you probably won't even need to worry about Ethernet/WiFi for internet. Although if WiFi is available on the RPi you can connect to it in hot-spot mode for maintenance. The digi-peater will pass all traffic back to the main iGate over the air. As Craig (KM6LYW) said earlier, limit the moving parts. So passive cooling and if possible, pin diode TX/RX switching. Enable the ToT on the radio. Short as possible. I also built the board as described on the Direwolf documentation that uses a 555 timer to restrict the TX time. In my case, to 3 seconds. Weatherproof the set-up. Back-up the SD card to an image on your PC but also keep a second prepared SD card with the remote setup. ?
Tom
G0JSV |
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Lynn Deffenbaugh
开云体育Actually, my guess for POR was "Power On
Reset", but that was only my guess.? TLAs* without expansions are
terrible.?
Lynn (D) - KJ4ERJ - Author of APRSISCE
for Windows Mobile and Win32
PS.? *Three Letter Acronyms On 11/30/2021 2:59 AM, TomT wrote:
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I also assumed "Power On Reset" for a long running computer device. At work, we no longer use the term TLA (Three Letter Acronyms) as now-a-days, many use more than letters. We now refer to them as TCA (Three Character Acronyms) or often FCA (Four Character Acronyms).? Working in Automotive, we are now thankful Fiat-Chrysler-Automotive has been renamed <grin>. Robert Giuliano
On Tuesday, November 30, 2021, 05:22:48 AM EST, Lynn Deffenbaugh <kj4erj@...> wrote:
Actually, my guess for POR was "Power On
Reset", but that was only my guess.? TLAs* without expansions are
terrible.?
Lynn (D) - KJ4ERJ - Author of APRSISCE
for Windows Mobile and Win32
PS.? *Three Letter Acronyms On 11/30/2021 2:59 AM, TomT wrote:
Somebody asked about POR. Point of reference I believe.
At this end a receive only i-Gate has been running for a couple of years on a RPi model A. The receiver being a RTL-Dongle and the set-up is located in the loft so protected from the elements. The OS is running RW but I haven't had any issues. More recently, I have added a separate Digi-peater/i-Gate combo using a RPi v4 (overkill I know) in a passive heatsink type case plus a Baofeng UV5RE. This is connected to a 2M beam pointing north which wasn't covered by other local digi-peaters. So a few thoughts to build up the POR. It sounds as if your digipeater is just that and isn't a combo (digipeater/i-gate) so you probably won't even need to worry about Ethernet/WiFi for internet. Although if WiFi is available on the RPi you can connect to it in hot-spot mode for maintenance. The digi-peater will pass all traffic back to the main iGate over the air. As Craig (KM6LYW) said earlier, limit the moving parts. So passive cooling and if possible, pin diode TX/RX switching. Enable the ToT on the radio. Short as possible. I also built the board as described on the Direwolf documentation that uses a 555 timer to restrict the TX time. In my case, to 3 seconds. Weatherproof the set-up. Back-up the SD card to an image on your PC but also keep a second prepared SD card with the remote setup. ?
Tom
G0JSV
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