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Lora, ESP32 + MicroPython

Lora, ESP32 + MicroPython

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LSN50 -Waterproof Long Range Wireless LoRa Sensor Nodedwmzone.com/en/dragino/536-1604-lsn50-waterproof-long-range-wireless-lora-sensor-node.html#/22-center_frequency-868mhz Heltec ASR650x-based ( ARM® Cortex M0+ Core and SX1262 ) heltec.org/project/htcc-ab01/ ( 3.5uA ) heltec.org/project/htcc-am01/ ( 3.5uA ) github.com/HelTecAutomation/ASR650x-Arduino/blob/master/PinoutDiagram/HTCC-AM01.pdf github.com/HelTecAutomation/ASR650x-Arduino ESP32-PICO + SX1276 module heltec.org/project/wireless-stick-lite/ ( 30uA ) heltec.org/project/wireless-shell/ ( 10uA ) docs.heltec.cn/download/wireless_shell_reference_hardware_design.pdf github.com/Heltec-Aaron-Lee/WiFi_Kit_series/files/3469714/Sleep.test.Panda.Board.txt www.aliexpress.com/item/33030551325.html github.com/Heltec-Aaron-Lee/WiFi_Kit_series/tree/master/esp32/libraries/ESP32/examples/DeepSleep/ExternalWakeUp TTGO 868MHz/915MHz SX1276 ESP32 LoRa 0.96 Inch Blue OLED Display Bluetooth WIFI Lora Kit 32 Module IOT Board for Arduinowww.aliexpress.com/item/32840258107.html MicroPython firmware port with lots includedgithub.com/loboris/MicroPython_ESP32_psRAM_LoBo/wiki github.com/aizukanne/ESP32-micropython-lora github.com/mallagant/uLoRaWAN github.com/pycom/pycom-micropython-sigfox www.hackster.io/search?i=projects&q=lorawan

Old House Insulation and Ventilation

Old House Insulation and Ventilation

www.earthouses.co.uk/tag/lime-render/ www.greenspec.co.uk/building-design/woodfibre-retrofit/ www.grandishdesigns.co.uk/external-insulation/ www.maverickmansions.com/ www.mikewye.co.uk/gallery/insulating-render/ – Great Read, East Devon Firm www.lime-green.co.uk/products/lime-render/finish-WP www.littlegreene.com/paint/finish/limewash billus.co.uk/wp-content/uploads/2019/07/techpaper14-keeping-warm.pdf

MicroPython & ULP/RTC Memory

MicroPython & ULP/RTC Memory

Big power advantages exist for using the ULP ( Ultra Low Power ) processor for regular tasks like recording a state change from a GPIO or ADC input, storing the information within the RTC memory, then waking the main CPU up when the information needs to be transmitted via Lora. The programming of the ULP can now be done via a simple MicroPython wrapper: github.com/ThomasWaldmann/py-esp32-ulp/ github.com/micropython/micropython/pull/3578 ULP examples github.com/espressif/esp-iot-solution/tree/master/examples/ulp_examples LoBo MicroPython for ESP32github.com/loboris/MicroPython_ESP32_psRAM_LoBo/wiki/rtcgithub.com/loboris/MicroPython_ESP32_psRAM_LoBo/wiki adds RTC.read and RTC.write NB: Still looking…

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e-Bike Lithium Ion Load Tester

e-Bike Lithium Ion Load Tester

Using power resistors is not feasable, but AC halogen bulbs are easily sources up to 500W , so multiple bulbs can be used to vary the current 120 Vrms 500 bulb watts 28.8 bulb resistance 52 battery voltage 93.88889 watts 1.805556 amps So on a 52V battery pack a 500w halogen bulb would draw about 1.8Amps Voltage can be monitored with a simple voltage divider to lower the 52V to something suitable ( < 3v probably ) Current can be…

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Lora Modules

Lora Modules

Heltec – LoRa Node 151< 2uA sleep heltec.org/project/lora-node-151/ docs.heltec.cn/download/LoRa_Node_151.pdf docs.heltec.cn/#/en/products/lora/lora_node/heltec_lora_node_list_eu Bugger the Node 151 is not ESP32 and so is using different code! grrrr below is a simple codebase for there heltec.org/project/wireless-stick-lite/ github.com/HelTecAutomation/ESP32_LoRaWAN LoRaWAN module in Cgithub.com/mcci-catena/arduino-lmic#supported-hardware www.dragino.com/products/lora.htmlwww.robotshop.com/en/dragino-technology.html www.thethingsnetwork.org/forum/t/which-module-has-the-lowest-sleep-current/15622 …… Murata’s CMWX1ZZABZ (STM32L082 and SX1276)github.com/kriswiner/CMWX1ZZABZ hackaday.io/project/35169-hackable-cmwx1zzabz-lora-devices wireless.murata.com/type-abz.html shop.sodaq.com/868-915-mhz-lora-lorawan-module.html Grasshopper LoRa/LoRaWAN Development Board www.tindie.com/products/tleracorp/grasshopper-loralorawan-development-board/ £32STM32L082 Development Board with SX1276 LoRa Radio programmable using Arduino IDE via USB Connector RAK811 868Mhz LoRa LoRaWAN Module www.rakwireless.com/en/module/lora/RAK811 downloads.rakwireless.com/en/LoRa/RAK811/Hardware_Specification/RAK811_LoRa_Module_Datasheet_V1.4.pdf www.tindie.com/products/kilobyte/rak811-868mhz-lora-lorawan-module/ £17Standard original RAK Wireless RAK811…

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69 Signs You Live on a Boat

69 Signs You Live on a Boat

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stumbled upon this list  Sleeping in a house makes you feel claustrophobic because there isn’t a hatch overhead to look at the stars. You know smaller is actually sometimes better. You find yourself bleeding from random places at random times. You and your girlfriend define “taking a break” as moving about six feet apart and looking in opposite directions. You avoid telling people you live on a boat just so you don’t have to explain to them how you shower… again. You are…

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HAProxy – Slowing down abuse with user friendly rate controls

HAProxy – Slowing down abuse with user friendly rate controls

There are various situations where clients can overload a website server, but you don’t want to return a 4xx or 5xx simply because the system is getting bogged down, instead it would be better to have a mechanism which tries to take the pressure off the backend server to give all clients a fair chance. Thankfully HAProxy has a couple of ways that requests can be slowed down on their way to the backend, the cleanest mechanism is to use…

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Frsky Taranis setup for Ardupilot

Frsky Taranis setup for Ardupilot

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The Frsky Taranis is a very cool RC transmitter with some serious advanced functionality. Here are a couple of URLs covering how to configure the unit for Adrupilot mode switching and also how to simplify auto tuning