![]() You should now have a working TTN gateway, but to help with long-term robustness we should minimise The code snippet is available in the PDF documentation at Generate a RAK reset pulse on GPIO25 at boot-time which sorted out the problem. Getting a suitable reset pulse from the driver software, I added a few lines to PoEUPSPi.sh to explicitly Little wrinkle I found, that had me scratching my head for while, was that the RAK board did not seem to be Ideally you'll have a LoRa device handy and a TTN application set up for it so that it canĬonnect and transmit data through your new gateway and you can see it arriving on your TTN console. The Things Network, and get your gateway registered and linked up to TTN. Continue with RAK's getting started guide to configure the gateway, open an account with Software & without a service script in place, be sure to disable the PoEUPSPi watchdog function by linking Running to (a) keep the watch-dog alive and (b) monitor for shutdown requests. If you're already up and running with a PoEUPSPi board then you'll know you need a service script PCB-2-M4, while the flat M4 screw-mounts are part No PCB-9-M4įrom RAK's downloads site (above) I simply followed their getting started instructions, downloading the RPifirmware disk image and writing it to an 8GB SD card (using Win32diskimager) from which the RPi dulyīooted. Mechanical bits and pieces come from Toby electronics, the four right-angle M4 screw-mounts are part No The gerber file-sets for carrier and carrier-end PCBs are available to downloadįrom my web site, where you'll also find some photos: Short section of 60mm square-section plastic drain-pipe, available from all good DIY stores, and screws into The end pieces bolt to eitherĮnd of the carrier and a variety of holes provide mounting points for connectors, ventilation and room forĪn optional 30mm fan - I found in practice the fan was unnecessary. PoEUPSPi sits on top of the RPi with the RAK concentrator board atop that. The RPi bolts directly to the carrier, the PCBs from are so cheap I opted to construct the skeleton of my enclosure from a set of 3Ĭustom PCBs, a carrier board and two identical end pieces. I opted for an indoor enclosure that therefore doesn't need IP65 waterproofing and which can benefit fromĬonvection cooling in a benign environment, an outdoor enclosure option is quite possible but comes withĮxtra challenges - the system dissipates about 4W so thermal management needs to be considered. PoE is the ideal way to power any such system. While this part of the system is optional I would definitely recommend the extra work and expense. PoEUPSPi is compatible only with model 3B+ Raspberry Pis - they're the only ones with a PoE header. Rebooting the Pi should it for some reason crash or stop working for more than 60 seconds. The watchdog function provides an additional line of defence, automatically Power returns the Pi's supply is held off while the supercaps fully re-charge (about 20s) at which point the Then 15 seconds in which to cleanly shut down the Pi before the inevitable power-out. Second hold-up time : 15 seconds of run-through during which if power returns the system just carries on Basically, in the event of power failure the board provides a 30 Years when trying to embed Raspberry Pis. There is no prospect of a power-outage trashing the Pi's SD card - an issue I've been plagued with over the ![]() This is the component that makes the gateway robust, reliable and dependable. I designed this board especially for the LoRa gateway project but it could well find many uses elsewhere. This is a somewhat more demanding build, all the resources you should need are at: PoEUPSPi supercap-based UPS PoE power supply & watch-dog board UFL pigtail for the LoRa antenna - I'd recommend N-type, see below. Note that it requires an active GPS antenna, any of the ones on sale at Amazon/Ebay etc should be fine.įor GPS you'll probably need a UFL to SMA pigtail (which might come bundled with the GPS antenna) plus a Just a couple of additionalīuild notes: take resistor values from the schematic in preference to the BOM, omit resistor R1 & R5, link Spend a little extra on P&P you can get your boards delivered surprisingly quickly. They are amazingly cheap but the quality and service is excellent, if you're happy to ![]() Little board, well documented, easy to source components, straightforward to build and works perfectly.īeyond Logic recommend using HK-based to manufacture the PCB, a recommendation It was originallyĭesigned around RAK's earlier 833 module but is 100% compatible with the newer RAK2247. Offers a PCB design for a Raspberry Pi HAT that supports a RAK-compatible PCI Express Mini Card formfactor interface, it incorporates a 3.3V switch-mode power supply and a GPS receiver. ![]()
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