"""Writes an initialization nibble to the LCD. LcdApi._init_(self, num_lines, num_columns) Self.hal_write_init_nibble(self.LCD_FUNCTION) Sleep_ms(5) # need to delay at least 4.1 msec Self.hal_write_init_nibble(self.LCD_FUNCTION_RESET) """Implements a character based lcd connected via PCF8574 on i2c."""ĭef _init_(self, i2c, i2c_addr, num_lines, num_columns): # Defines shifts or masks for the various LCD line attached to the PCF8574
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE) Īnd i have tried to send the exact same thing while all is connected to the esp8266 but, no luck.Īm i missing something? Am i doing something wrong? Should writeto_mem be used instead of writeto (like in pyb_i2c_adafruit)? I have done some small tests in that regard but, what would be the registers for PCF8574T? Is it ok to send in hex? Maybe it have something to do with the fact that the I2C implementation on the esp8266 is done in software?Īny tips to help me get this working would be greatly appreciated!Ĭode: Select all """Implements a character based lcd connected via PCF8574 on i2c.""" I also been fiddling with the LiquidCrystal code on arduino to intercept what was sent to the I2C slave during those simple steps : TypeError: object with buffer protocol required (self.i2c_addr, hex(value))Īs trying to send the actual value (int) will return : What i have tried so far was to change all the occurrences of : The I2C interface i am using looks like the same as described at :Īnd i can make it work with arduino without any issue (chip is labelled as PCF8574T). To make it work on esp8266 with an HD44780 style character LCD but, after many attempts, i am still unable to get the same LCD working with an I2C interface. I have been able to modify the pyb_gpio code over : One of my connections was off just a little and the numbers went HAYWIRE! I would wave my hand 3 foot above the rig and it would stop dead in it's tracks.CRAZY MANNNN.Sorry to post on an old topic but, i am quite in the same situation. IMPORTANT NOTE: Make sure all solder joints are completely and solidly soldered on the HX711. Power Up and TEST your connections once, or twice, before you put it all together. Regardless of how you assemble it, just pay close attention to connection locations and jumper cable lengths you'll be using. Whether it's like mine or if you just want to use some Popsicle sticks and 2X4's.it's your call. This is where YOU need to get creative based on what you have on hand for building the scale frame.
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