The WORKBENCH part 3

Nice. Just curious:

  • What size (probably 18650) and capacity is your LiFePO4 cell?
  • Is the node doing any measurements?
  • How often does it transmit messages?

Yeah, it is a 18650 LiFePO4 and I don’t recall the capacity. I do seem to recall not buying the most expensive as it was my first experiment with the chemistry un-regulated on a 3.3v MCU.

The node has a BMP280 which it wakes and polls every 15 minutes so 96 cycles per day. Here are some snaps from browser views today, the battery voltage and the frame counter. This node was reset 1.5 months after deployment by a curious kid who asked what the little button did after he had pressed it! How human :smile:
It is running at 96 transmits per day for over 12 months at this stage!

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Yeah…
As I said in the other thread, mine is approaching 4 months with a 700 mAh Soshine, posting data from a BME280 every 5 minutes…
I disabled ADR a couple of days ago (using a downlink command), as I realised that due to some recent change in TTN, every uplink was generating a downlink :blush:

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2 x LoRa SX1276 RS485 RS232 Long Range rf Transceiver E32-DTU-868L30

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DB9%20RS232%20Male%20Female%20Connector
ordered these for making my own very short cables, for programming the units I use this USB- RS232 cable

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RPI booting from M-sata works … but with that fancy passive cooling it won’t fit :rofl:

  • update : fixed

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  • update - didn’t meassure the exact capacity of the battery (yet) but this solar unit seems usable as
    an solar outdoor lorawan alarm node enclosure :sunglasses:

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I want to present you my project :grinning:

eAgrar is system for monitoring conditions of plants and for monitoring weather on agricultural fields.
This sensor device is plug-and-play device, it is battery powered and uses LoRa technology for communication. It is used as part of TTN network. Also, there is dashboard where you can monitor all measured data.
Device uses RFM95W LoRa module for communication

I want to ask you to get in link and “Like project” so I can get in TOP20 of Hackaday Prize. It will enable me to keep delevoping this system.

https://hackaday.io/proje…/165235-eagrar-digital-agriculture

So get in link, register and LIKE PROJECT. :slight_smile:

Thank you! :beers:

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’ Sensor devices send data to multichannel gateway which forward them to database. ’

I have developed system for controlling devices in LoRa wireless sensor network . So even that device is not connected to Internet all time, I’m able to change sleep time, communication parameters and other parameters remotely, without reprogramming device.

can you explain a bit more… is it a ‘protocol’ on top of lorawan … how does this work that you can set intervaltime from a sensor remotely :roll_eyes:

liked

can you explain a bit more… is it a ‘protocol’ on top of lorawan … how does this work that you can set intervaltime from a sensor remotely :roll_eyes:

Yes, it is kind of protocol on top of LoRaWAN and inside of device.
Device is connected to TTN network. Using downlink messages, I’m able to managed how device works. Device can recevice message, take parameters and commands from message, and keep working based on new settings.
For example, if your device is in ABP mode, and you want to change Spreading factor, you don’t have to connect device to computer again and reprogram it. It is enough to send downlink message with needed code and device will update settings.

Thanks for like! :beers:

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installed desktop widget CONKY on RPI

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old cheap tele solution video experiment … now even cheaper :wink:

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found this… but what is it ?? :thinking:

I’m pretty sure its a temp gauge for kilns, ceramic kilns. the “CONE” label is to mark the start of the transition of glazes that are applied to ceramics and the state of the clay, I think the smaller numbers in that area would be for different temp pyrometric cones … same type my parents used for their kilns, until dad got sick of reading it and swapped it to a digital rs232 temp monitor to talk to our atari st.

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Tempature (pyrometer) meter for a ceramic kiln

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ok tnx…
it came from someone who used to collect and polish minerals/stones/cristals… thing like that

what ? $145.00 ? I struck gold ! :wink:

for some rf experiments I want to remotely switch the node/device antenna’s
bought the chips last year… but now I found complete modules that I will use :sunglasses:
HMC%20284%20DC-3500MHZ%20Single-Pole%20Double-Throw

5%20GHz%20RF%20Single-pole%20Four-throw

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cheap IP 67 waterproof outdoor node enclosure with mounting bracket :roll_eyes:

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Hi @BoRRoZ, you really made me laugh with this one. I studiously read all your workbench and bargain postings and often follow the links and sometimes buy samples of the things to try out.

I want to buy one of these… but - for the first time that I can remember - there does not seem to be a link with the image! :open_mouth:

Please can you post with a link. Big thanks from me for all your posts.

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Hi Tim , I bought long time ago 3 pcs (2 by mistake) 698-2700 Mhz antennas , absolutely not usable for LoRa … but I can’t throw things away '…can be used in the future :wink:)

  • seller is not to be found anylonger
    I bought them for around 10E… they are still available but for a different price :scream:

but maybe someday…
omni1

  • update
    getting closer to 10€ :sweat_smile:

gettingthere

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