Estas usando un sistema de control el cual no tiene entradas análogas como un Raspberry Pi, o a tu opción favorita se le han acabado los pines de entrada análoga
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Analog to Digital ADC Module 16-Bit ADS1115 I2C 4-Channel ADC Development Board Analog to Digital Converter Module : : Industrial & Scientific
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ADS1115 16 Bit 4 Channel I2C IIC Analog-to-Digital ADC PGA Converter with Programmable Gain Amplifier Board for Arduino - AliExpress
Ads1115 Adc Module Analog-to-digital Converter 16-bit 4 Channel High Precision I2c Iic Interface For Battery Monitor - Integrated Circuits - AliExpress
MODULO CONVERSOR ANALOGICO A DIGITAL (ADC) ADS1115 –
Ads1115 Adc Module Analog-to-digital Converter 16-bit 4 Channel High Precision I2c Iic Interface For Battery Monitor - Integrated Circuits - AliExpress
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Conversor Analogico A Digital Adc Ads1115 Raspberry Arduino – Candy-HO
Ads1115 16 bit 16 byte 4 channel I2c Iic Analog digital Adc - Temu
Convertidor Digital a Analógico DAC I2C MCP4725 - Electronilab
ADS1115 16-Bit, 4-Channel ADC Analog Digital Converter Module
Buy ADS1115 ADC 4 Channel 16Bit I2C PGA Low Power for Arduino