I think I have world's first directional USB type C product 🙂 @lilygo #IoT #esp32
World’s first directional USB type C product
Router upgrade and 3D printed a wall mount
Router upgrade finally arrives. Family of four working and studying from home plus 25 connected smart things made the old router unreliable. Planning on flashing Merlin. 3D printed a wall mount for the router Measurable speed improvements – new vs old router speed test
LoRaWAN node with a solar harvesting module
Testing a #LoRaWAN node with a solar harvesting module. Sending temp and batt once every 5 min @ SF7. Node is placed near a north facing window, it is showing and completely overcast. 1800 lux measured by phone. Recording battery readouts, will post them in few days. #IoT
OTAA once, ABP thereafter on my LoRaWAN projects
Considering doing OTAA once, storing the credentials and using ABP thereafter on my LoRaWAN projects e.g. battery change, reset etc. Rationale: OTAA requires good gateway->node reception, whereas in remote areas this might be hard to achieve. Does this violate some good practice?
SMB20 Geiger tube
Received a SMB20 Geiger tube to replace the J305 I had on my Geiger Computer project. Should work much better outdoors, the J305 goes crazy on sunlight. Works well after adjusting the CPM to uSv/hour constant, see more here https://cs.stanford.edu/people/nick/geiger/
This normal now @Microsoft
Not to spoil the party, but is this normal now? @Microsoft
Relay coils dissipate that much heat
TBH, I didn't realize relay coils dissipate that much heat when energized. This one gets to nearly 29*C. TE has an interesting application note on PWM-ing the relay to keep temp and energy consumption low. https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=13C9133_DC_Relay_Power_Reduction_AppNote&DocType=CS&DocLang=EN
CCS811 air quality breakout
Will be testing a CCS811 air quality breakout; a digital gas sensor that senses a wide range of Total Volatile Organic Compounds (TVOCs). Doesn't seem to be battery friendly though.. #IoT
SAMD21+RFM95 on a 1400mAh battery
Experimenting how many #LoRaWAN messages (20 bytes payload that includes battery reading and internal CPU temperature @ SF7) can a SAMD21+RFM95 send on a 2000mAh Li-Polymer battery. Currently at 23392 messages, and battery is at 3.826V (80% full).. aiming at 120K messages. #IoT Si it died today at 68323 transmission. The battery is 1400mAh, not…
SAMD21’s internal temperature for sensorless room
SAMD21’s internal temperature seems pretty accurate to measure ambient temperature when on battery power/mostly sleeping. Experimenting with sensorless room temperature monitoring using #LoRaWAN
WebUSB configuration of a SAMD21 based LoRaWAN node
Experimenting with WebUSB configuration of a SAMD21 based LoRaWAN node, PoC works very well so far. Will extend with all posible configurations, so just about anyone could customize the settings within a minute or so. Just plug in, configure and go!
RTL-SDR monitoring the 433Mhz wireless packets
RTL-SDR monitoring the 433Mhz wireless packets send by my home automation nodes (RFM69 FSK) #IoT #SDR #homeautomation
New toy RTL-SDR v3 complete bundle
New toy: RTL-SDR v3 complete bundle #SDR
Migrated all of my projects to VisualStudioCode
Migrated all of my projects to #VisualStudioCode, can now develop under one IDE. Works much faster too, a 300K lines of code project of mine builds under 15 seconds on 8 core i9/16G compared to 37 seconds on Eclipse. Should have done this long ago..
LoRaWAN airtime calculator
Useful LoRaWAN airtime calculator; helps calculate the max daily transmissions per SF/payload size to comply with @thethingsntwrk fair access policy #IoT #TTN #LoRaWAN –> https://docs.google.com/spreadsheets/d/1QvcKsGeTTPpr9icj4XkKXq4r2zTc2j0gsHLrnplzM3I/edit#gid=0
LoRaWAN antenna works pretty well
The new #LoRaWAN antenna works pretty well, consistently receiving packets from a Moteino M0+RFM95 with a 82mm plain wire as antenna parked 13km away, SF10, -117dB RSSI. Got sporadic receipts from ~20km away
Solar harvesting LiPo chargers
Just ordered one of @jrsikken's Solar harvesting LiPo chargers, looks promising https://www.tindie.com/products/jaspersikken/solar-harvesting-into-li-ion-battery/
LoRaWAN gateway as offline
@thethingsntwrk console shows my #LoRaWAN gateway as offline, friends confirm the same with their gateways. Is it something local?
A proper antenna for my LoRaWAN gateway
Finally a proper antenna for my @thethingsntwrk #LoRaWAN gateway.
Daylight Saving Time nonsense again
Ah, that Daylight Saving Time nonsense again..
pi+3.5″ 3D printed enclosure won’t close
Fail of the day: @adafruit 's pi+3.5" 3D printed enclosure won't close. I have their older 3.5" TFT+touch version though, this was designed for the newer one.
The 170 EUR Hikvision thermal camera
The 170 EUR Hikvision thermal camera arrived, impressive 160×120@25fps quality
Debugging TTN/LMIC code with my new Atmel-ICE
Debugging TTN/LMIC code with my new Atmel-ICE in @PlatformIO_Org, no more serial/LED for debugging 🙂
Atmel-ICE on my desk
An Atmel-ICE landing on my desk @MicrochipTech, guaranteed fun time ahead. Planning on fiddling with Cortex M0 bootloaders as a starter.
According to @FedExEurope, I moved
According to @FedExEurope, I moved:
RFM95 with a simple 82mm wire as antenna
RFM95 with a simple 82mm wire as antenna has a much better range than the ESP32 TTGO LORA module with uFL antenna. Less is more? #LoRaWAN #IoT
SAMD21 based Moteino M0 + rfm95 LoRaWAN module
#SAMD21 based Moteino M0 + rfm95 #LoRaWAN module + SPI flash sleep current around 12uA. Not great, not terrible. Wakes periodically to send data to The Things Network using LMIC Arduino library. #IoT Dropped to 8.5uA with "crystalless" option.. cool 🙂
Moteino M0 sending data to the @thethingsntwrk
Moteino M0 sending data to the @thethingsntwrk using RFM95 and LMIC library. Had to wire RST and DIO1 pins for full library compatibility. #IoT #LoRaWAN Battery powered 🙂
PLA fillament shipment undergoing quality inspection
PLA fillament shipment undergoing quality inspection. #3Dprinting
Non-standard PCB thickness of 1.3mm on the Moteino M0
Wondering why @LowPowerLab Felix decided to use non-standard PCB thickness of 1.3mm on the Moteino M0, can't use a standard RPSMA connector
3Dprinted an enclosure for a TTGO ESP32 LoRaWAN node
#3Dprinted an enclosure for a TTGO #ESP32 #LoRaWAN node, not a very good fit though.. will try alternatives
SAMD21D as a mass storage device
Experimenting with SAMD21D posing as a mass storage device using @Adafruit's TinyUSB library – planning on using this feature to expose configuration JSONs #IoT Added external SPI flash and using it as R/W mass storage device, works nice and smooth 🙂 Firmware configurations are now esposed as JSON file when you plug it in a…