Weight I2C Unit

Weight I2C 单元是一个称重采集发射单元，它采用“STM32+HX711芯片”方案，通过I2C通信实现24位精度的重量测量，但不包括称重传感器。这个单元能够测量重量，并包含各种滤波器。

支持以下产品：

WEIGHT I2C

Micropython Example:

import os, sys, io
import M5
from M5 import *
from hardware import *
from unit import WEIGHT_I2CUnit
import time

i2c0 = I2C(0, scl=Pin(1), sda=Pin(2), freq=100000)
weight_i2c0 = WEIGHT_I2CUnit(i2c0)
print(weight_i2c_0.get_adc_raw)
print(weight_i2c_0.get_weight_float)
time.sleep_ms(100)

UIFLOW2 Example:

example.svg

class WEIGHT_I2CUnit

Constructors

class WEIGHT_I2CUnit(i2c0, 0x26)

创建一个 WEIGHT_I2CUnit 对象。

  • I2C0 is I2C Port.

  • 0x26 is default I2C address

UIFLOW2:

init_i2c_address.svg

Methods

WEIGHT_I2CUnit.get_adc_raw()

获取原始的 ADC 值。

UIFLOW2:

get_adc_raw.svg

WEIGHT_I2CUnit.get_weight_float()

获取以克为单位的重量浮点值。

UIFLOW2:

get_weight_float.svg

WEIGHT_I2CUnit.get_weight_int()

获取以克为单位的重量整数值。

UIFLOW2:

get_weight_int.svg

WEIGHT_I2CUnit.get_weight_str()

获取以克为单位的重量字符串值。

UIFLOW2:

get_weight_str.svg

WEIGHT_I2CUnit.set_reset_offset()

重置偏移值(Tare).

UIFLOW2:

set_reset_offset.svg

WEIGHT_I2CUnit.set_calibration(weight1_g, weight1_adc, weight2_g, weight2_adc)

校准称重传感器。

  • weight1_g: Weight1 in grams.

  • weight1_adc: Weight1 in ADC value.

  • weight2_g: Weight2 in grams.

  • weight2_adc: Weight2 in ADC value.

calibration steps:

1.重置抵消(皮重)

UIFLOW2:

set_calibration.svg

WEIGHT_I2CUnit.set_lowpass_filter(Enable)

启用或禁用低通滤波器。

UIFLOW2:

set_lowpass_filter.svg

WEIGHT_I2CUnit.get_lowpass_filter()

返回低通滤波器的状态（启用或禁用）。

UIFLOW2:

get_lowpass_filter.svg

WEIGHT_I2CUnit.set_average_filter_level(level)

设置平均滤波器的级别。

  • level:平均过滤器的电平(0 - 50)。更大的值可以获得更平滑的结果，但延迟更长

UIFLOW2:

set_average_filter_level.svg

WEIGHT_I2CUnit.get_average_filter_level()

返回平均滤波器的级别。

UIFLOW2:

get_average_filter_level.svg

WEIGHT_I2CUnit.set_ema_filter_alpha(alpha)

设置EMA滤波器的alpha值。

与平均滤波器相比，EMA（指数移动平均）滤波器对数据的变化更敏感。

  • alpha: Alpha value for the EMA filter (0 - 99). Smaller value for smoother result but more latency

UIFLOW2:

set_ema_filter_alpha.svg

WEIGHT_I2CUnit.get_ema_filter_alpha()

Returns the alpha value for the EMA filter.

UIFLOW2:

get_ema_filter_alpha.svg

WEIGHT_I2CUnit.set_i2c_address(address)

i2c地址可以由用户更改，该地址应该在0x01和0x7F之间。

  • address:地址范围(0x01 - 0x7F)。

UIFLOW2:

set_i2c_address.svg

WEIGHT_I2CUnit.get_device_spec(info)

获取此设备的固件版本详情和I2c地址。

  • info: (0xFE, 0xFF)

UIFLOW2:

get_device_spec.svg