/goodwe-lcd.py
Created Aug 25, 2018
Goodwe data LCD display
| #!/usr/bin/python | |
| # https://raspberrytips.nl/raspberry-pi-goodwe-zonnepaneel-omvormer/ | |
| # 25/08/2018 - Richard IJzermans | |
| import sys | |
| import smbus | |
| import time | |
| import datetime | |
| import json | |
| import urllib | |
| # Vul hier je Goodwe PV master gebruikersnaam in | |
| USERNAME = 'GEBRUIKERSNAAM' | |
| I2C_ADDR = 0x3F # I2C device address | |
| LCD_WIDTH = 20 # Maximum characters per line | |
| LCD_CHR = 1 # Mode - Sending data | |
| LCD_CMD = 0 # Mode - Sending command | |
| LCD_LINE_1 = 0x80 # LCD RAM address for the 1st line | |
| LCD_LINE_2 = 0xC0 # LCD RAM address for the 2nd line | |
| LCD_LINE_3 = 0x94 # LCD RAM address for the 3rd line | |
| LCD_LINE_4 = 0xD4 # LCD RAM address for the 4th line | |
| LCD_BACKLIGHT = 0x08 # On 0X08 / Off 0x00 | |
| ENABLE = 0b00000100 # Enable bit | |
| E_PULSE = 0.0005 | |
| E_DELAY = 0.0005 | |
| bus = smbus.SMBus(1) # Rev 2 Pi uses 1 | |
| def lcd_init(): | |
| lcd_byte(0x33,LCD_CMD) # 110011 Initialise | |
| lcd_byte(0x32,LCD_CMD) # 110010 Initialise | |
| lcd_byte(0x06,LCD_CMD) # 000110 Cursor move direction | |
| lcd_byte(0x0C,LCD_CMD) # 001100 Display On,Cursor Off, Blink Off | |
| lcd_byte(0x28,LCD_CMD) # 101000 Data length, number of lines, font size | |
| lcd_byte(0x01,LCD_CMD) # 000001 Clear display | |
| time.sleep(E_DELAY) | |
| def lcd_byte(bits, mode): | |
| bits_high = mode | (bits & 0xF0) | LCD_BACKLIGHT | |
| bits_low = mode | ((bits<<4) & 0xF0) | LCD_BACKLIGHT | |
| bus.write_byte(I2C_ADDR, bits_high) | |
| lcd_toggle_enable(bits_high) | |
| bus.write_byte(I2C_ADDR, bits_low) | |
| lcd_toggle_enable(bits_low) | |
| def lcd_toggle_enable(bits): | |
| time.sleep(E_DELAY) | |
| bus.write_byte(I2C_ADDR, (bits | ENABLE)) | |
| time.sleep(E_PULSE) | |
| bus.write_byte(I2C_ADDR,(bits & ~ENABLE)) | |
| time.sleep(E_DELAY) | |
| def lcd_string(message,line): | |
| message = message.ljust(LCD_WIDTH," ") | |
| lcd_byte(line, LCD_CMD) | |
| for i in range(LCD_WIDTH): | |
| lcd_byte(ord(message[i]),LCD_CHR) | |
| def main(): | |
| lcd_init() | |
| while True: | |
| try: | |
| jsonfile = json.load(urllib.urlopen('https://eu.goodwe-power.com/Mobile/GetMyPowerStationByUser?userName='+USERNAME)) | |
| except ValueError: | |
| line1 = '***' | |
| line2 = 'Error kan data niet' | |
| line3 = 'inladen...' | |
| line4 = '***' | |
| else: | |
| percent = int(float(jsonfile[0]['currentPower'][:-2]) / (float(jsonfile[0]['capacity'][:-2])/100)) | |
| line1 = time.strftime("%d.%m.%Y %H:%M") | |
| line2 = 'Power: ' + jsonfile[0]['currentPower'] + ' ' + str(percent) + '%' | |
| line3 = 'Today: ' + jsonfile[0]['value_eDayTotal'] | |
| line4 = 'Total: ' + jsonfile[0]['value_eTotal'] | |
| lcd_string( line1 ,LCD_LINE_1) | |
| lcd_string( line2 ,LCD_LINE_2) | |
| lcd_string( line3 ,LCD_LINE_3) | |
| lcd_string( line4 ,LCD_LINE_4) | |
| time.sleep(60) | |
| if __name__ == '__main__': | |
| try: | |
| main() | |
| except KeyboardInterrupt: | |
| pass | |
| finally: | |
| lcd_byte(0x01, LCD_CMD) |
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