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Difference between revisions of "ATMega328 LoRaWAN Node"

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* Two mounting holes
 
* Two mounting holes
 
* No more voltage measurement for the 3.3V/Vcc bus, as this can be done internally on the ATMega
 
* No more voltage measurement for the 3.3V/Vcc bus, as this can be done internally on the ATMega
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== Parts ==
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'''Note''': Antenna and LoRaWAN module are dependent on the local frequency band used for LoRaWAN. The selected items are meant for 868Mhz, which is the frequency band for Europe
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{| class=wikitable
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! Part !! Partnumber !! Amount !! Source !! Notes
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|-
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| PCB || ATMega328 LoRaWAN Node PCB v0.4 || 1 || - ||
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|-
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| Microcontroller || ATMega 328P-PU || 1
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|[https://www.reichelt.de/8-bit-atmega-avr-mikrocontroller-32-kb-20-mhz-pdip-28-atmega-328p-pu-p119685.html?search=atmega+328 Reichelt]
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|
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|-
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| IC socket || 28pin || 1
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|[https://www.reichelt.de/ic-sockel-28-polig-doppelter-federkontakt-gs-28-s-p86281.html?&trstct=pol_1&nbc=1 Reichelt] ||
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|
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|-
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| Quartz || 8Mhz, HC49U-S || 1 || [https://www.reichelt.de/standardquarz-grundton-8-000000-mhz-8-0000-hc49u-s-p32845.html?&trstct=pol_1&nbc=1 Reichelt] ||
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|-
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| Capacitor || C4, C5: 22pF || 2 || [https://www.reichelt.de/smd-vielschicht-keramikkondensator-22p-5--npo-g0805-22p-p13517.html?&trstct=pol_2&nbc=1 Reichelt] ||
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|-
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| Capacitor || C6, C7: 100nF || 2 || [https://www.reichelt.de/smd-vielschicht-keramikkondensator-100n-10--x7r-g0805-100n-p31879.html?&trstct=pol_0&nbc=1 Reichelt] ||
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|-
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| Antenna || 868Mhz SMA || 1 || [https://www.digikey.com/short/z31vhd DigiKey]<br>[https://www.amazon.com/gp/product/B01K1RWAFY?ie=UTF8&tag=tiefpunkt-20&camp=1789&linkCode=xm2&creativeASIN=B01K1RWAFY Amazon US]<br>[https://www.amazon.de/gp/product/B01E564GLI?ie=UTF8&tag=tiefpunkt-21&camp=1638&linkCode=xm2&creativeASIN=B01E564GLI Amazon DE]<br>[https://www.aliexpress.com/item/32688049266.html AliExpress] ||
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|-
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| Antenna Connector || SMA Edge mount || 1
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| [https://www.digikey.com/short/z31vpt DigiKey]<br>[https://www.amazon.com/gp/product/B07V54598M?ie=UTF8&tag=tiefpunkt-20&camp=1789&linkCode=xm2&creativeASIN=B07V54598M Amazon US]<br>[https://www.amazon.de/gp/product/B01LY3Q486?ie=UTF8&tag=tiefpunkt-21&camp=1638&linkCode=xm2&creativeASIN=B01LY3Q486 Amazon DE]<br>[https://www.aliexpress.com/item/32815676763.html AliExpress]
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|
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|-
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| || u.FL surface mount
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| [https://www.digikey.com/product-detail/en/te-connectivity-amp-connectors/1909763-1/A118077CT-ND/4729711 DigiKey]
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| To connect an SMA antenna, you will need a matching pigtail
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|-
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| LoRa Module
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| RFM95 868Mhz
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| [https://www.digikey.com/short/z31vrw DigiKey]<br>[https://www.amazon.com/gp/product/B07VWV9R4S?ie=UTF8&tag=tiefpunkt-20&camp=1789&linkCode=xm2&creativeASIN=B07VWV9R4S&th=1 Amazon US]<br>[https://www.amazon.de/gp/product/B079GFD25Z?ie=UTF8&tag=tiefpunkt-21&camp=1638&linkCode=xm2&creativeASIN=B079GFD25Z Amazon DE]
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|
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|-
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| Battery Holder || 2x AA || AliExpress ||
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|-
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| Case || Abzweigdose 75x75 || Hardware store [https://www.bauhaus.info/schalterdosen-deckel/abzweigdose/p/12165125], [https://www.hornbach.de/shop/Spelsberg-Abzweigkasten-SD7-75x75-mm-33290701/6060827/artikel.html?] ||
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|}
  
 
== License ==
 
== License ==

Revision as of 20:53, 8 January 2021

     
ATMega328 LoRaWAN Node

Release status: experimental [box doku]

Description A LoRaWAN node based on the ATMega328 and the RFM95 LoRa module.
Last Version  0.4 (2021-01-03)
Platform  ATMega328
License  CC BY-SA 4.0

The ATMega328 LoRaWAN Node is the successor of the ProMini LoRaWAN Node. As the ProMini version, it is powered by an ATMega328, running at 3.3V and 8Mhz, but instead of using an Arduino ProMini board, it uses a barebones ATMega328. This removes the issues of the ProMini board such as weird pin layout for the I2C pins, the always-on LED, and the power regulator. There have been some additional fixes to the ProMini Node board, such as:

  • Reordering the power pins so you can solder in screw connectors as well
  • Strain relief holes next to the power pins
  • Two mounting holes
  • No more voltage measurement for the 3.3V/Vcc bus, as this can be done internally on the ATMega

Parts

Note: Antenna and LoRaWAN module are dependent on the local frequency band used for LoRaWAN. The selected items are meant for 868Mhz, which is the frequency band for Europe

Part Partnumber Amount Source Notes
PCB ATMega328 LoRaWAN Node PCB v0.4 1 -
Microcontroller ATMega 328P-PU 1 Reichelt
IC socket 28pin 1 Reichelt
Quartz 8Mhz, HC49U-S 1 Reichelt
Capacitor C4, C5: 22pF 2 Reichelt
Capacitor C6, C7: 100nF 2 Reichelt
Antenna 868Mhz SMA 1 DigiKey
Amazon US
Amazon DE
AliExpress
Antenna Connector SMA Edge mount 1 DigiKey
Amazon US
Amazon DE
AliExpress
u.FL surface mount DigiKey To connect an SMA antenna, you will need a matching pigtail
LoRa Module RFM95 868Mhz DigiKey
Amazon US
Amazon DE
Battery Holder 2x AA AliExpress
Case Abzweigdose 75x75 Hardware store [1], [2]

License

  • Licensed under Creative Commons Attribution-ShareAlike 4.0 Unported License (CC BY-SA 4.0)