Drove around Sofia and suburbs with one of @boyannedkov #LoRaWAN GPS trackers, impressive coverage for a 20mW RFM95 transmitter. Managed to reach a gateway 32km away, practically no blind spots. External antenna, pictured below. #ttn #ttnmapper
3D printing a T-Rex skeleton for the kids (including the grown up kid tweeting this)
#3DBenchy printed in 1h 45min, using 100% default settings as I have no clue what they mean yet. Result is pretty good for what I care. Creality Ender 3 V2, Cura
64.4 dB noise level while 3D printing #3DBenchy on my new Creality Ender 3 V2, mostly fan hum. Stepper motors are barely hearable.
Just received a Creality Ender-3 V2 3D printer, my first. Hope it works well.
Stocking on gadgets in anticipation of another lockdown in the winter.. mostly IoT and engineering stuff. The bad thing is my Aliexpress wishlist has ~200 more items..
Completed a 4 EUR #LoRaWAN gateway enclosure for outdoor use using PVC fittings. Apart from the aesthetical crime being committed, it is pretty cool. #IoT
@Flashoholic Just heard back from Dialog Semi: "we are working on a GCC based SDK but this is not public yet and not ready to be released." – That's great news
When you are eager to try that new SoC, but don't have the breakout board.. #IoT #DA16200 @DialogSemi Better view
My profile picture toonified by #AI https://deepai.org/machine-learning-model/toonify TBH I look like a neanderthal with glasses. The rest of the family looks cute though, so there is hope.
Just received couple DA16200MODs, the new 70uA while connected to WiFi SoC #IoT
Thinking about creating a low cost, battery powered temperature and humidity #LoRaWAN #IoT node with always on LCD like this:
Having an interesting discussion with @LowPowerLab's Felix on optimizing his RFM69 library for further power consumption savings, check it out here: https://lowpowerlab.com/forum/rf-range-antennas-rfm69-library/rfm69-driver-interrupt-based-wait-for-packetsent/
Ordered a HIKVISON H10 160×120 25Hz IR infrared thermal imager camera for €170. Sounds too good to be true, awaiting delivery to make a detailed review. The known issue is that menu is in Chinese language only.
My TTN LoRaWAN gateway is up and running. Next steps are finding proper antenna and outdoor enclosure. #lorawan
Interesting new WiFi SoC by @DialogSemi – the DA16200. Promises averaged 72µA power consumption and 1 sec response time while always connected to the network. Perfect for battery powered WiFi #IoT nodes. I will order few samples and research it further. https://youtu.be/d80X2GtTNBk
Just ordered a @PiSupply LoRa Gateway HAT for Raspberry Pi (RAK 2247 based). Planning on using it for a @thethingsntwrk gateway. #IoT
Wireless and battery powered bistable (latching) relay IoT node with practically unlimited standby listen time. Relay is rated 16A/230V. Controlled by ESP32+RFM69 gateway (WiFi, MQTT). What practical usecases for this can you think of?
Lowpower listening on 433Mhz while consuming 1.2uA. Range about 100m, reaction time about 800ms-1.5s. The node on the right sends data/awakes the node on the left upon button press, consumes 300nA in standby. Using RFM69 transceivers with Atmega328 and @LowPowerLab 's library More details under scope: the receiver wakes for ~250us every second, consuming 19mA…
Dug up an old prototype of a low cost monochrome 7 segment LCD display + DS18B20 temperature sensor + Atmega328 + RFM69 433Mhz transceiver project. 30uA sleep current. e-paper is still relatively more expensive alternative. #IoT
Just received my first handeld ham radio. The Baofeng UV-5R seems to be a popular model, feature packed, powerful (1/4/8W?? selectable) and dirt cheap. Switched TX power to 1W to avoid accidental transmission interference until I get proper ham radio license.
Just realized that we shouldn't be using TLS as it involves handshakes. This is bad in the times of COVID19
Do clean your PCBs after soldering the components. Before/after power consumption measurements, the soldering flux, dust create tiny, invisible pathways for current to leak.. #IoT
CuurentRanger firmware cusomizations and update completed
Now that I own a 'current ranger' device, I am measuring the power consumption of old projects of mine. Pictured below a Atmega328+RFM69 based smoke alarm detector, standby current is 6.5uA so practically no battery impact..
Pleased to see MQTT pop up here and there in modern automotive cluster architectures. Unfortunately can't share more details due to confidentiality.
Kenwood breadmaker hub & drive coupling assembly replacement instructions literally say take apart the breadmaker to pieces in order to replace the broken drive. Estimated repair time: 1 hr 30 min. Me: drill the bottom out, swap the part and be done in less than 15 min The replacement instructions: https://www.espares.co.uk/advice/careandmaintenance/replacing-a-breadmaker-hub-and-drive-coupling-assembly-twist-and-lock
@LowPowerLab Current ranger just arrived, excited to test out
@mvdswaluw Link to the sensor: https://www.amazon.de/dp/B00R2U8LLG
Testing a cheap PIR sensor, seems to be working fine down to 2.0V with no modifications (strange?). 25uA quiescent current at that voltage. Considering it for a battery powered PIR IoT node. Power consumption at 3.0V:
What is the proper shielding enclosure and measurement location (indoors/outdoors) for Geiger counter projects? Taking mine outside gives Chernobyl level readings , indoors is 0.15uSv/h (15-25 cpm) .. so obviously direct sunlight affects the GM tube heavily, and it must be shielded. Good information here: https://www.gqelectronicsllc.com/forum/topic.asp?TOPIC_ID=4540
Completed a connected environmental radioactivity monitor project. Pumps live data to the geiger counter world map http://gmcmap.com, records readings history for dashboard visualization and alerts me if abnormal values are detected. #IoT