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Last modification: 09/07/2025Contributor: Marian Minar

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NEW! SourceForge.net:

• Oscilloscope-like applicationeCScope for Raspberry PI 3+ (32bit Raspbian) based on INA260 chips and built with the Ecomet-i2c-sensors Python library.

Project eCScope was created to show progress in development. Insert the #eCScope keyword into the issue section.

PyPi module:ecomet-i2c-sensor

Current release: 0.1.9 !NEW!

New features

• AS3935 driver added (Sciosens)
• SGP40 driver added (Sensirion)
• MCP3221 driver added (Microchip)
• MCP3221 added feature for convert measured number to range or 360 degree, or cardinal points
• Fixes in PCA9632, prepared for multiple chips at I2C bus
• HDC1080 driver mainly code rewritten, different method calls

pip install ecomet-i2c-sensors

Test release: 0.1.9

pip3 install -i https://test.pypi.org/simple/ecomet-i2c-sensors

Wiki Hardware prototypes boards:link

Scope:The Driver for I2C Chip maintenance fromRaspberry PI 1B+ and above andAllWinner CPU. This code tools contains python & free pascal code focused to I2C communication of raspberry pi with IOT modules.

• tested at Raspberry PI 1B+, 3B+, 4B+, 4CM
• tested at AllWinner CPU H616, mangopi MCore-H616, Orange PI Zero2

Current CHIP maintained:

• AMS-ScioSense AS3935
• AMS-OSRAM TSL25911
• EEPROM Chip24c01,24c02,24c04,24c08,24c16,24c32,24c64,24c128,24c256,24c512,24c1024
• Measurement Specialties, TE Connectivity MS5637,HTU21D
• Microchip EMC2301, MCP3221
• NXP SemiconductorPCA9632 (could be modified for PCA9624,PCA9635PW,PCA9685,PCA9955B,PCA9956B)PCA9557
• Panasonic SN-GCJA5
• Renesas ISL28022
• Sensirion SGP40
• Solomon Systech SSD1309
• Texas InstrumentsHDC1080,PCA9557,INA226,INA260
• X-Powers AXP209

List of modules:

• AS3935 ->!NEW! Franklin Lightning Sensor
• AXP209 -> PMU (Power Management Unit) Sensor
• EEPROM module -> EEPROM read/write 24cXXX chips
• EMC2301 module -> Fan controller with a PWM fan driver
• HDC1080 module -> High Accuracy Digital Humidity Sensor with Temperature Sensor
• HTU21D module -> Digital Relative Humidity sensor with Temperature output, calculation of Dew Point
• INA226,INA260 module -> Precision Digital Current and Power Monitor With Low-Drift, Precision Integrated Shunt
• ISL2802x module -> will be added python module description
• MCP3221 module ->!NEW! Low-Power 12-Bit A/D Converter
• MS5637 module -> Ultra-compact micro altimeter. Integrated digital pressure sensor (24 bit ΔΣ ADC), Operating range: 300 to 1200 mbar, -40 to +85 °C
• PCA9557 module -> Remote8-Bit I2C and SMBusLow-PowerI/O ExpanderWith Reset andConfigurationRegisters
• PCA9632 module -> 4-bit Fm+ I2C-bus low power LED driver (could be used for motor control)
• SGP40 module -> Indoor Air Quality Sensor for VOC Measurements
• SN-GCJA5 -> Laser Type PM Sensor
• SSD1306 module -> SSD1306 is a single-chip CMOS OLED/PLED driver with controller for organic / polymer light emittingdiode dot-matrix graphic display system.
• TSL25911 -> Ambient Light Sensor

Software for Chips:

Setting of config file for ecomet-i2c-sensors python library:

Library is looking in directory~/.comet for file config.yaml that contains i2c parameters for custom linux distribution and I2C EEPROM memory setting.Here is a example of config file content:

comet@orangepizero2:~/.comet $ cat config.yaml---# The I2C config filei2c:    smb: i2c-3# set bus i2c-1    smb_detect: 0..3# list of monitored smb bus by i2cdetect    eeprom:      ic:'24c01'      slaveaddr: 0x50      writestrobe: 26# hold pin low to write to eeprom    sensor:      ms5637:        pressure:          { min: 600, max: 1300 }      sn_gcja5:        PM1_0:          { min: 0, max: 1200 }        PM2_5:          { min: 0, max: 1200 }        PM10:          { min: 0, max: 1200 }

Note: Currently only one eeprom chip could be added.

Alternative command for I2C chip detection:

Here is alternative command to i2cdetect for detection of active I2C chips at I2C bus:i2c_ecomet_detect.py

pi@raspberrypi:~/ecomet_i2c_raspberry_tools/bin $python3i2c_ecomet_detect.py3.9.9 (main,Jan162022,22:51:22)[GCC11.2.0]ecomet.Board_Platform:INFOStartlogging ...ecomet.Board_Platform:INFOBoardplatform:RASPBERRY_PI4B:1.4ecomet.Board_Platform:INFONumberofI2Cbusesattheboard:2ecomet_i2c_sensors.platform.i2c_platform:INFO>>>Testingatbus:0ecomet_i2c_sensors.platform.i2c_platform:INFONoChipconnectedecomet_i2c_sensors.platform.i2c_platform:INFO>>>Testingatbus:1ecomet_i2c_sensors.platform.i2c_platform:INFODefaultbusnumber:1ecomet_i2c_sensors.platform.i2c_platform:INFOIdentifiedSlavesChips:0xc:0x1a:0x2f:0x40:0x50:0x51:0x52:0x53:0x54:0x55:0x56:0x57:0x62:0x70:0x76

Requestor Interests:If you would like to reqest some new feature or add some new Chip at the development list let me know by adding issue or by email.