Repository https://gitlab.com/raupulus/rpi-pico-energy-monitor
Sitio web del autor: https://raupulus.dev
Este software lee la intensidad y el voltaje de las entradas ADC, el siguiente paso es conectarse a la red inalámbrica y cargar datos a la API.
This software read intensity and voltage from ADC inputs, next step connect to wireless and upload data to api.
Copie todos los archivos en raspberry pi pico, por ejemplo con el software thonny.
Copy all files in raspberry pi pico, for example with thonny software.
Envía PR o contacta conmigo en Gitlab: https://gitlab.com/raupulus/rpi-pico-energy-monitor
Send PR or contact with me on Gitlab: https://gitlab.com/raupulus/rpi-pico-energy-monitor
- Author: Raúl Caro Pastorino
- Display library from AnthonyKNorman in repository: https://github.com/AnthonyKNorman/MicroPython_ST7735
Proyecto de código abierto, licencia GPLv3.
Open source project, GPLv3 license.
Liberación beta inicial, versión estable en proceso.
Initial beta Realease, stable versión work in progress.
### Display ST7735 1.8 SPI 128x160
| Name | Pin | Details |
|---|---|---|
| VLED | 3,3v | Power for display backlight |
| SCK(CLK) | 10 | SPI Clock |
| SDA(MOSI) | 11 | (Tiene que estar conectado a RX) |
| A0(DC) | 12 | Data/Command select |
| RST | 9 | Reset |
| CS | 13 | Chip Select |
| GND | GND | Ground - |
| VCC | 5v | Power + (Según datasheet, debería funcionar a 3,3v también) |
Este sensor, cuando no tiene consumo para medir dará la mitad de la tensión de entrada (si entran 5v, saldrá 2,5v por lo que esa tensión equivale a 0 consumo y 5v equivale al máximo del sensor: 5/20/30).
Ejemplo:
Analog out min voltage = 2,5v (Equivale a 0A) Analog out max voltage = 5v (Equivale a 30A)
Sensibilidad:
| Type | Sensitivity |
|---|---|
| 5A | 185mV/A |
| 20A | 100mV/A |
| 30A | 66mV/A |
| Name | Pin | Details |
|---|---|---|
| VCC | 5v/3.3v | Power + |
| GND | GND | Ground - |
| AO | I1=27 y I2=26 | Analog out |
| Name | Pin | Details |
|---|---|---|
| VCC | 3,3V (Ejemplos con 5v, al ser divisor de tensión debería funcionar con 3,3v igual) | |
| GND | GND | Ground - |
| AO | GPIO28 | Analog out |
| Name | Pin | Details |
|---|---|---|
| GPIO | 7 | Only for power on display |
| Name | Pin | Details |
|---|---|---|
| SDA | 4 | I2C |
| SDC | 5 | I2C |
| Name | Pin | Details |
|---|---|---|
| SDA | 4 | I2C |
| SDC | 5 | I2C |
Para el uso de este conversor, estamos utilizando la librería de Robert-hh en su repositorio: https://github.com/robert-hh/ads1x15
Se encuentra en el proyecto dentro en Library/Ads1x15.py.
Voltaje máximo (Vin): 25V DC (Vref=5V) Voltaje máximo (Vin): 16.5V DC (Vref=3.3V) Corriente máxima: 3A
RS- Pin which is the negative side of the sensing resistor GND Pin SIGN Pin the sign pin will actually tell which way the current is flowing. In battery-powered operation, it actually gives us an indication of discharge and charging feature. OUT Pin this is the voltage output pin, so we will get a voltage output of one volt per amp and we can feed that into an analog to digital converter on our Arduino Uno or Arduino Nano and we could actually calculate the current through a load. So it is very simple, the voltage out is actually the current through the load. GND pin is the same as the other ground pin and finally RS+ Pin which is the positive side of the sensing resistor.