Orkhan AmirAslan on Hackaday.io has created a RAK4260 based, Feather styled LoRa dev-board:
This is a SAMR34 based LoRa dev-board with all the necessary components for fast prototyping. It’s a successor of my previous Penguino RF module and Feather breakout design ( https://www.tindie.com/products/16985/
)The new design uses the RAK4260 module from @RAKWireless and improves on some aspects, such as USB Type-C, RGB LED, user button, battery protection & voltage supervision, and optional flash & per-provisioned secure element IC pads.
About a year ago, after I first saw SAMR34 System in Package (SiP) in 2018 Electronica I couldn’t find a module for it and I took up the challenge for myself to build one myself. Then sharing first renders with the Twitterverse it gathered quite a bit of interest and I started selling couple over at my Tindie store. At the time I named the project TinyLoRa but for legal reasons I had to change it to Penguino.
- ATSAMR34J18 LoRA System-in-Package (SiP) based RAK4260
- ARM Cortex M0+ MCU & SX1276 LoRa Radio
- 256KB Flash, 40 KB RAM
- Max Tx Power: +20 dBm; Max Sensitivity: -148dBm; Rx Current: 17mA (typical)
- Frequency Range: 862 to 1020 MHz (DS values)
- Deep Sleep Current: ~1 μA (module only)
- Li-Po battery charging IC
- RGB user LED, Battery Charge Status (red) and Power (blue) (w/ cut-off jumpers)
- 3.3V low Iq LDO (~1 μA)
- Low-voltage battery cut-off supervisor IC (3V Vbat cutoff)
- USB Type-C connector with protection/filtering circuit
- 0.75 A resettable fuse
- Voltage divider for Vbat monitoring (w/ cut-off jumpers)
- SMA and u.FL antenna connectors
- 10-pin SWD programming header
- Dimensions: 2 in. x 0.9 in. (50.8 mm x 22.8 mm)
Joey Castillo has created an awesome open hardware reading device:
The Open Book is an open-hardware device for reading books in all the languages of the world. It includes a large screen and buttons for navigation, as well as audio options for accessibility and ports to extend its functionality. Its detailed silkscreen, with the all the manic energy and quixotic ambition of a Dr. Bronner’s bottle, aims to demystify the Open Book’s own design, breaking down for the curious reader both how the book works, and how they can build one for themselves.
At the core of the Open Book is a SAMD51J19A microcontroller, a powerful ARM Cortex M4 with 512 KB of Flash and 192 KB of RAM. It has 51 pins of GPIO, and the Open Book uses all of them for peripherals and possibilities:
A 400×300 black and white e-paper screen enables the core experience of, y’know, reading.
A MicroSD slot allows for plenty of external storage for files. An offline copy of Wikipedia fits in 64 gigs — Hitchhiker’s Guide, anyone?
User input comes from seven buttons on a shift register, plus an eighth button tied directly to one of the SAMD51’s interrupt pins.
A dedicated flash chip for languages gives the book room to store glyphs and Unicode data for every language in the Basic Multilingual Plane (which is most of the languages in use today).
A 3.5mm audio jack
Joey (@josecastillo) did a demo of the the Open Book e-reader on Adafruit Show-n-Tell last night (jump to 15 min 59 sec):
Dan Watson has designed a new FeatherWing that adds the MicroChip RN2483/RN2903 LoRaWAN module to Adafruit Feather:
Help your Feather fly into the IoT clouds with this awesome LoRaWAN module from MicroChip.
SyncChannelBlog has shared the board on OSH Park: