[DisasterRadio] Next Dev Board

[leez]

Anyone around sudoroom working on DR tonight?

On 11/13/18 11:13 PM, John Fitz wrote:
> Hi all,
> 
> So definitely going for ICs on board rather than modules for this next
> build. The cost savings are just to great:
> 
> ESP32 $2.6 per IC vs $3.7 for module = savings ~$1
> LORA $3 per IC vs $9 per module = saving ~$6 x 2 = $12
> CN3791 + passives ~$1  vs $3.5 per module = saving ~$2.5,
> 
> I believe as long as we don't advertise, we can sell uncompleted boards
> for home use without FCC Certification (per FCC Part 15.23).
> <http://www.gpo.gov/fdsys/pkg/CFR-2010-title47-vol1/pdf/CFR-2010-title47-vol1-sec15-23.pdf>
> 
> Nico: I'll definitely have pinouts for a DHT22 sensor and much more.
> Rafael: A schematic/board review would be a great help. I'll notify
> everyone when the board is ready for review. Maybe we can try and
> integrate everything onto an IC one day...
> leez: we'll definitely have to do some power consumption/efficiency
> testing with new boards. Maybe we can integrate power monitoring with
> the lora mesh.
> 
> The new board is located in the repo here (
> https://github.com/sudomesh/disaster-radio/tree/master/hardware/board_v4
> ),  please let me know if anyone has issues opening the board in KiCAD,
> 
> -Fitz
> 
> 
> On Tue, Nov 13, 2018 at 11:53 AM Morgan Allen <morganrallen at gmail.com
> <mailto:morganrallen at gmail.com>> wrote:
> 
>     Awesome! Glad to hear about the switch to ESP32.
>     I've already been putting in a lot of work developing an SX127x
>     driver for this chip.
>     https://gitlab.com/morganrallen/esp32-lora
>     Feel free to bug me for any direct support if that gets used (or
>     even arduino-LoRa, I'm a co-maintainer on that)
> 
>     Going to attempt to swing by tonight.
> 
>     On Mon, Nov 12, 2018 at 8:34 PM John Fitz <johnfitzeecs at gmail.com
>     <mailto:johnfitzeecs at gmail.com>> wrote:
> 
>         Hi all,
> 
>         I finally have some free time to work on the next Disaster-Radio
>         dev board. Before I get started, I wanted to double check the
>         major components with everyone:
> 
>         * ESP32
>         * 2x LORA IC
>         * SD FLASH CARD
>         * CN3791 MPPT solar charger
>         * 18650 LiPo Battery
> 
>         I'm considering ditching modules for this next build and using
>         IC's directly on board for the ESP32 and Lora IC:
>          * ESP32 -
>         https://lcsc.com/product-detail/RF-Transceiver-ICs_Espressif-Systems-ESP32_C80134.html
>          * LORA -
>         https://www.digikey.com/product-detail/en/semtech-corporation/SX1273IMLTRT/SX1273IMLTRTTR-ND/5226771
> 
>         This will definitely lower costs and allow a bit more
>         flexibility. I'm not sure if the RFM95 is available directly as
>         an IC. Is there any issue with using the SX1273 instead?
> 
>         I'll be at hardware hacking tomorrow night too, if anyone has
>         any ideas or wants to brain storm.
> 
>         -Fitz
>         _______________________________________________
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>         DisasterRadio at lists.sudoroom.org
>         <mailto:DisasterRadio at lists.sudoroom.org>
>         https://sudoroom.org/lists/listinfo/disasterradio
> 
> 
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-- 
♥Ⓐ(ɔ) leez

GPG: https://leez.us/duolc/index.php/s/nCJQf0a4HVrktRY

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