LoRa inductive cyble water meter sensor

Completed

STD LoRa inductive cyble water meter sensor

Arduino

2.4G/RF

Home_Electronics

License: CC BY-NC-SA 3.0

Mode:

Editors' pick

Update time： 2024-02-25 15:38:21

Creation time： 2023-01-09 18:34:40

Description

This is a sensor to put onto a water meter having a rotating metallic disc called "cyble". It detect the oscillation weakening when the inductor is in the front of the metallic part. LoRa module transmit measure values.

Firmware is an example of working. It must be adapted to the shape of the cyble (half disc, third disc) and to the LoRa packet to transmit.

Design explanations could be found here :

https://www.sanglierlab.fr/2022/12/08/capteur-sans-fil-pour-compteur-deau-avec-cyble-partie-1-principe-de-fonctionnement/

https://www.sanglierlab.fr/2023/01/12/capteur-sans-fil-pour-compteur-deau-avec-cyble-partie-2-ameliorations-du-prototype/

Design Drawing

schematic diagram

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Schematic_LoRa Cyble water meter sensor
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PCB

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PCB_LoRa Cyble water meter sensor
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	100pF	C1,C7,C9	C0805	3
2	100nF	C2,C3,C4,C5,C11,C13	C0805	6
3	2.2nF	C6,C8	C0805	2
4	10uF	C10	CASE-A_3216	1
5	22uF	C12	C0805	1
6	SS14	D1,D2	SMA_L4.2-W2.6-LS5.3-RD	2
7	AVR_ISP_INLINE	ISP1	AVRISP_INLINE_SMD	1
8	SERIAL	J1	HDR-M-2.54_1X4	1
9	1mH	L1,L2	L-05HCP	2
10	LED	LED1	LED0805_RED	1
11	MODE	PUSH	KEY-SMD_4P-L6.0-W6.0-P4.50	1
12	470	R1,R3,R6,R8	R0805	4
13	470k	R2,R5,R7,R9,R12,R14	R0805	6
14	100k	R4	R0805	1
15	1k	R10,R13	R0805	2
16	47k	R11	R0805	1
17	10k	R15,R16	R0805	2
18	ATMEGA328P-AU	U1	TQFP-32_L7.0-W7.0-P0.80-LS9.0-BL	1
19	LM4040AIM3X-2.5	U2	SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR	1
20	SX1278 - RA01	U3	WIRELM-SMD_M-SX1278S2	1
21	JST-XH-02-PIN	X1	JST-XH-02-PACKAGE-LONG-PAD	1