LoraBatBox - Revision history

Bertrik Sikken at 12:11, 28 July 2022

2022-07-28T12:11:49Z

← Older revision		Revision as of 12:11, 28 July 2022
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	\|Omschrijving=Monitoring bat boxes with LoRa		\|Omschrijving=Monitoring bat boxes with LoRa
	\|Picture=lorabatbox.jpg		\|Picture=lorabatbox.jpg
	\|Status=~~Initializing~~		\|Status=Completed
	\|Contact=bertrik		\|Contact=bertrik
	}}		}}

Bertrik Sikken at 13:13, 16 July 2021

2021-07-16T13:13:03Z

← Older revision		Revision as of 13:13, 16 July 2021
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	This sensor is supported on http://cayenne.mydevices.com		This sensor is supported on http://cayenne.mydevices.com

	How to migrate:		Apparently KPN got this idea now too, using their own network:
			https://www.overons.kpn/nl/nieuws/2021/innovatieve-toepassing-op-lora-meet-aanwezigheid-beschermde-diersoorten-en-geeft-boost-aan-verduurzaming-woningsector

			How to migrate this particular sensor from TTNv2 to TTNv3:
	https://www.thethingsnetwork.org/forum/t/migrating-tabs-browan-sensors-remote-reboot-to-trigger-otaa/44461		https://www.thethingsnetwork.org/forum/t/migrating-tabs-browan-sensors-remote-reboot-to-trigger-otaa/44461

Bertrik Sikken: /* Software */

2021-07-15T17:33:09Z

Software

← Older revision		Revision as of 17:33, 15 July 2021
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	== Software ==		== Software ==
	* Arduino firmware: https://github.com/bertrik/lorabatbox		* Arduino firmware: https://github.com/bertrik/lorabatbox
	* backend Java application: https://github.com/bertrik/~~lorabatboxbackend~~		* backend Java application: https://github.com/bertrik/motionsensorbackend

	== External references ==		== External references ==

Bertrik Sikken at 13:08, 17 May 2021

2021-05-17T13:08:32Z

← Older revision		Revision as of 13:08, 17 May 2021
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	It appears it already does what this project was planned to do. Senses motion in a 50x50x20 mm box with battery compartment, built-in LoRaWAN antenna, low-power design. Also reports internal temperature and battery level.		It appears it already does what this project was planned to do. Senses motion in a 50x50x20 mm box with battery compartment, built-in LoRaWAN antenna, low-power design. Also reports internal temperature and battery level.
	This sensor is supported on http://cayenne.mydevices.com		This sensor is supported on http://cayenne.mydevices.com

			How to migrate:
			https://www.thethingsnetwork.org/forum/t/migrating-tabs-browan-sensors-remote-reboot-to-trigger-otaa/44461

	== Introduction ==		== Introduction ==

Bertrik Sikken at 13:54, 13 August 2020

2020-08-13T13:54:24Z

← Older revision		Revision as of 13:54, 13 August 2020
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	To check if a bat box is in use by bats, you can walk up to the tree that the box is mounted on and shine a light into it to see if there are any bats there.		To check if a bat box is in use by bats, you can walk up to the tree that the box is mounted on and shine a light into it to see if there are any bats there.
	But I think it would be nice to investigate if this can be done automatically, without having to go to the individual box and without disturbing the bats with a light!		But I think it would be nice to investigate if this can be done automatically, without having to go to the individual box and without disturbing the bats with a light!


	Update:		Update:
	Consider this ready-built sensor: https://www.antratek.nl/lorawan-motion-sensor		Consider this ready-built sensor: https://www.antratek.nl/lorawan-motion-sensor
	It appears it already does what this project was planned to do. Senses motion in a 50x50x20 mm box with battery compartment, built-in LoRaWAN antenna, low-power design.		It appears it already does what this project was planned to do. Senses motion in a 50x50x20 mm box with battery compartment, built-in LoRaWAN antenna, low-power design. Also reports internal temperature and battery level.
	~~Also this~~ sensor is ~~already~~ supported on http://cayenne.mydevices.com		This sensor is supported on http://cayenne.mydevices.com

	== Introduction ==		== Introduction ==

Bertrik Sikken at 10:14, 13 August 2020

2020-08-13T10:14:57Z

← Older revision		Revision as of 10:14, 13 August 2020
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	To check if a bat box is in use by bats, you can walk up to the tree that the box is mounted on and shine a light into it to see if there are any bats there.		To check if a bat box is in use by bats, you can walk up to the tree that the box is mounted on and shine a light into it to see if there are any bats there.
	But I think it would be nice to investigate if this can be done automatically, without having to go to the individual box and without disturbing the bats with a light!		But I think it would be nice to investigate if this can be done automatically, without having to go to the individual box and without disturbing the bats with a light!

			Update:
			Consider this ready-built sensor: https://www.antratek.nl/lorawan-motion-sensor
			It appears it already does what this project was planned to do. Senses motion in a 50x50x20 mm box with battery compartment, built-in LoRaWAN antenna, low-power design.
			Also this sensor is already supported on http://cayenne.mydevices.com

	== Introduction ==		== Introduction ==

Bertrik Sikken: /* Microcontroller */

2020-07-23T11:43:21Z

Microcontroller

← Older revision		Revision as of 11:43, 23 July 2020
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	=== Microcontroller ===		=== Microcontroller ===
	I've been considering several boards:		I've been considering several boards:
	* Heltec lora32 v2, familiar platform (ESP32), has a display, has low-power support in hardware (Vext can be switched off), has a 32 kHz to use with the onboard RTC, however not sure if I can use that with Arduino software		* Heltec lora32 v2, familiar platform (ESP32), has a display, has low-power support in hardware (Vext can be switched off), has a 32 kHz crystal to use with the onboard RTC, however not sure if I can use that with Arduino software
	* Heltec Cubecell board, should also be very low power, recently got platformio support		* Heltec Cubecell board, should also be very low power, recently got platformio support
	* stm board, currently not investigating		* stm board, currently not investigating

Bertrik Sikken: /* Introduction */

2020-07-23T11:42:41Z

Introduction

← Older revision		Revision as of 11:42, 23 July 2020
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	== Introduction ==		== Introduction ==
	The basic idea is to mount some piece of electronics in or on the bat box that monitors if there are any bats in there.		The basic idea is to mount some piece of electronics in or on the bat box that monitors if there are any bats in there, by monitoring movement within the bat box.
	Periodically (say once ~~a day~~), ~~the presence~~ of ~~bats~~ is broadcast using a ~~LoRa (long range)~~ radio transmitter to a central place ~~(e.g. the internet)~~.		Periodically (say once an hour), detection of movement is broadcast using a LoRaWAN radio transmitter to a central place.

	== Hardware design ==		== Hardware design ==

Bertrik Sikken: /* time synchronisation algorithm */

2020-07-15T11:51:28Z

time synchronisation algorithm

← Older revision		Revision as of 11:51, 15 July 2020
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	* in an uplink transmission from the bat box to the network, there is a field containing the UTC time (seconds since 1970/1/1) from the point of view of the bat box		* in an uplink transmission from the bat box to the network, there is a field containing the UTC time (seconds since 1970/1/1) from the point of view of the bat box
	* upon reception (a few seconds later), the network application compares the time field sent by the bat box with the actual time		* upon reception (a few seconds later), the network application compares the time field sent by the bat box with the actual time
	* if the difference is beyond some threshold (say ~~1 minute~~), it prepares a down-link transmission with the required offset to correct the time		* if the difference is beyond some threshold (say plus/minus 30 seconds), it prepares a down-link transmission with the required offset to correct the time
	* when the bat box receives the down-link transmission, it updates its clock with the correction offset.		* when the bat box receives the down-link transmission, it updates its clock with the correction offset.

Bertrik Sikken: /* ESP32 with LoRa */

2020-07-15T11:43:43Z

ESP32 with LoRa

← Older revision		Revision as of 11:43, 15 July 2020
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	[[File:HTB1PemDJpXXXXXHXpXXq6xXFXXXM.jpg\|right\|200px]]		[[File:HTB1PemDJpXXXXXHXpXXq6xXFXXXM.jpg\|right\|200px]]
	=== ~~ESP32 with LoRa~~ ===		=== Microcontroller ===
	~~There are nice~~ boards ~~containing an~~ ESP32 with ~~a LoRa radio~~, I ~~think I'll~~ use ~~this one instead of an STM32~~		I've been considering several boards:
			* Heltec lora32 v2, familiar platform (ESP32), has a display, has low-power support in hardware (Vext can be switched off), has a 32 kHz to use with the onboard RTC, however not sure if I can use that with Arduino software
			* Heltec Cubecell board, should also be very low power, recently got platformio support
			* stm board, currently not investigating

	[[File:Lifepo4.jpg\|right\|100px]]		[[File:Lifepo4.jpg\|right\|100px]]