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Category: Lora

Lora, ESP32 + MicroPython

Lora, ESP32 + MicroPython

LSN50 -Waterproof Long Range Wireless LoRa Sensor Node
dwmzone.com/en/dragino/536-1604-lsn50-waterproof-long-range-wireless-lora-sensor-node.html#/22-center_frequency-868mhz

Heltec

ASR650x-based ( ARMĀ® 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 Arduino
www.aliexpress.com/item/32840258107.html

MicroPython firmware port with lots included
github.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=lorawanRead More

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.… Read More

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

120Vrms
500bulb watts
28.8bulb resistance
52battery voltage
93.88889watts
1.805556amps

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 monitored with a shunt

30A FL-2 DC 75mV Current Shunt Resistor for Ammeter Amperemeter Panel Meter

www.ebay.co.uk/i/362323528806

www.ebay.co.uk/itm/Lamp-Holder-R7s-117mm-118mm-Linear-Halogen-160-500W-Halogen-Lampholder-/321935501041

www.amazon.co.uk/J118mm-Tungsten-Halogen-floodlight-security/dp/B004HDVS20

This instructables guide would be a good starting point
www.instructables.com/id/Li-ion-Capacity-Tester-/

Could be better to stick with one technology AKA PyCom
docs.pycom.io/datasheets/oem/l04/
github.com/maddog75/LoPyI2CLCD
Read More