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Water Meter or "How to get Home Assistant to send saved data to an Arduino"

OldSurferDude 18 Oct 2024, 02:19 last edited by

This is a pretty basic project except that the trick was to get Home Assistant (HA) to store the cumulative water usage and then send it back after an Arduino (re)boot.

Here is a link to my documentation, such as it is.

And a link to the Arduino code. (the HA side is in the previous document)

see also How I delete a node from HA and start over
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Announcements • 23 Mar 2014, 08:24 • hek 2 Apr 2014, 14:39

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@NotYetRated Hope you'll find good uses and a fun time while building your sensors.
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My Project • 13 Jan 2025, 18:10 • GLAB 16 Feb 2025, 01:11

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@OldSurferDude yeah, 10 virgin nodes powered up at the same time is a bad idea I seem to remember reading somwewhere here warning aginst that. If yu have node ID trust issues with Mysensors you should move your address to different locaion as 0x00 is used by Mysensors... just sayin..;)
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My Project • 9 Mar 2025, 10:06 • Paul Scarbro 13 Mar 2025, 00:15

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@Paul-Scarbro There are multitude of solution, but since we are in MySensors Land, let's do a MySensors solution. You'll quickly see that doing that adds a lot of overhead. We'll use an Arduino Nano or RF Nano if you're going to go whole hog. It can be run from 3.3V or 5V DC, not AC. The reed switch would be connected to an input of the Nano and one of the outputs would drive a relay. The relay would drive the chime. Your C++ program would be something like: #define inputButton 2; // connect reed switch here #define outputRelay 4; // connect relay to this pin see MySensors Relay example #define RELAY_ON 1 // GPIO value to write to turn on attached relay #define RELAY_OFF 0 // GPIO value to write to turn off attached relay void setup() { pinmode(inputButton,INPUT); pinmode(outputRelay,OUTPUT); // put your setup code here, to run once: } void loop() { // put your main code here, to run repeatedly: if (digitalRead(inputButton) == 0) { digitalWrite(outputRelay,RELAY_ON); wait(2000); // wait 2 seconds digitalWrite(outputRelay,RELAY_OFF); // now wait for door to close while(digitalRead(inputButton) == 0) ; //does nothing until reed switch opens } } There are some subtleties that I may have glossed over, but this is the gist. By looking at the MySensors Relay example, you'll see how to integrate this into a MySensors environment. That's where you'd want to get the RF Nano. I've made the assumption you're familiar with the Arduino IDE and you've looked into the MySensors environment.
Wio-E5 (STM32 and SX1262)
My Project • 31 Dec 2024, 17:52 • nagelc 25 Jan 2025, 20:21

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25 Jan 2025, 20:21

Quick Range Check on the WIO-E5-LE. The LE version uses only the low power PA, +14dBm max. Using the default settings except for 915MHz #define MY_SX126x_FREQUENCY (SX126x_915MHZ) #define MY_SX126x_LORA_SF LORA_SF7 #define MY_SX126x_LORA_BW LORA_BW_125 #define MY_SX126x_LORA_CR LORA_CR_4_5 I get about 190 meter range, just walking around the neighborhood, line of site except for some trees and power lines. No tuning on the antenna. Just using a 77.9mm wire. Not as dramatic as some have achieved with LoRa radio's, but plenty good enough for my house and yard : )
Long time test done with soil sensor!
My Project • 7 Jan 2025, 09:13 • Nicklas Starkel 13 Jan 2025, 09:10

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13 Jan 2025, 09:10

Wow @Nicklas-Starkel congrats, that sounds great! And thanks for the feedback. Would you mind sharing your setup? Regards, Edi
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My Project • 15 Jan 2025, 09:13 • Skylar Jones 15 Jan 2025, 09:13

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Water Meter or "How to get Home Assistant to send saved data to an Arduino"

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Water Meter or "How to get Home Assistant to send saved data to an Arduino"

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Welcome Announcements • 23 Mar 2014, 08:24 • hek 2 Apr 2014, 14:39

Nb of possible nodes in a mysensors networks with domoticz My Project • 13 Jan 2025, 18:10 • GLAB 16 Feb 2025, 01:11

Door chime My Project • 9 Mar 2025, 10:06 • Paul Scarbro 13 Mar 2025, 00:15

Wio-E5 (STM32 and SX1262) My Project • 31 Dec 2024, 17:52 • nagelc 25 Jan 2025, 20:21

Long time test done with soil sensor! My Project • 7 Jan 2025, 09:13 • Nicklas Starkel 13 Jan 2025, 09:10

Simulate Online-Recreating 'Flappy Bird' with Arduino Nano My Project • 15 Jan 2025, 09:13 • Skylar Jones 15 Jan 2025, 09:13

24Online

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My Project • 15 Jan 2025, 09:13 • Skylar Jones 15 Jan 2025, 09:13

24
Online

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