×

Please see all COVID-19 updates here as some shipments may be delayed due to CDC safety and staffing guidelines. If you have an order or shipping question please refer to our Customer Support page. For technical questions please check out our Forums. Thank you for your continued support.

D3Dev

Member Since: February 6, 2014

Country: United States

  • the perfect solution for my project ... Almost! Was going to order several, now none.

    please provide datasheet of the on-board mosfet . schematic indicates that the mosfet on board is spec'd at 1.1Amax /../600mOhm .
    I'm assuming the 600mOhm is the Rds-ON which is much too high for my application. maybe that's a mis-print?

    My project is a low power, sleeps most of the time, wakes once per hour to take a data sample and transmit. However, during transmit, my board peaks >2A @ Vbat. If Rds is 600mOhm the voltage drop thru this board will be 1.2V which will put the voltage to the application board lower than brown-out. (also, there's likely additional diode voltage drop thru the mosfet which will make the application voltage even lower!)

    Idea for next-gen version of this product: pair the TPL5110 nano-power timer with a more useful MOSFET, perhaps a N-mosfet that has very-low Rds-ON, or higher current capability P-channel?. I can see more applications if this product could switch more power.

  • anybody used one of these outdoors in sunlight? how readable is it? also is it usable in cold temperatures? esp. compared to LCD or other LED displays.

  • well ... why has it taken so long?! Finally! a wifi module to add to small projects that doesn't cost more than the all the other components! This breaks some barriers.

  • Got my SIM today. Inserted it in an old 3G Gobi/Qualcomm Netbook and got it to connect by using APN=epc.tmobile.com (AT+CGDCONT=...)

    Don't know what the "official" APN to use is ... SparkFun?

    Haven't tried any speedtest.net, but probably I couldn't help answer what T-Mobile 4G really is, since I don't have a 4G/LTE device (modem, router, etc), and I'm not sure what T-Mobile actually advertises in this coverage area.

  • Thank you SparkFun and TMobile! ... Just ordered one.
    (I'm hopeful (hint.hint) that just maybe sparkFun is cooking something up to offer a reasonably priced cellular hardware+service package that is easily integrated into uC-sized pacakges, and could be a feed to phant.io (sparkFun's "cloud" data service) or my own back-end.)

    I have soooo many projects that need wireless (cellular) remote data transfer, but they're low volume (100s of units), low-priced ($100s devices), low data volume (<50MB) and speed requirements... hard to justify the cellular data transfer when the cost of comms.hardware is 10x more than the cost of the device itself, and then to add $50/month service per device ... I can't sell that.

    Looking at your available cellular module SM5100B and BoB too pricey at ~$120 and from comments seems a bit iffy. Why can't there be an offering in the $50 range, small, simple, and stable availability (10+ year lifecycle). And then add a reasonably priced (<$10/mon) service plan from the carrier (T-Mobile/ AT&T / VZW) ... only need 3G or less speeds, and low volume (<50 MB per month) ... why pay for 10GB??? $50/mon?

    Enabling the smaller embedded sensors with cellular service, will drive the Internet of Things (IoT) ... (billions of devices/sensors sending data)

No public wish lists :(