[DisasterRadio] Next Dev Board
johnfitzeecs at gmail.com
Tue Nov 13 23:13:20 PST 2018
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).
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 (
), please let me know if anyone has issues opening the board in KiCAD,
On Tue, Nov 13, 2018 at 11:53 AM Morgan Allen <morganrallen at gmail.com>
> 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.
> 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> 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 -
>> * LORA -
>> 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.
>> DisasterRadio mailing list
>> DisasterRadio at lists.sudoroom.org
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