This HAT was developed to be the ultimate sensor integration solution for the Raspberry Pi.

It contains a DS2482S-800 8-channel 1-wire master controller, an MCP3208 8-channel 12-bit ADC interface, and a .96-inch 2-color I2C OLED display.

The HAT is configured for maximum flexibility. Some of the features:

• Can read (8) 1-wire sensors and read (8) ADC channels at the same time
• Up to 2 HATs can be stacked to allow for (16) 1-wire devices an (16) ADC inputs
• 1-wire master can be powered from 3.3v or 5v
• ADC can be configured for 3.3v or 5V VREF
• ADC powered from 5V to achieve maximum sample rate of 100ksps
• Large 3.3v terminal with polyfuse protection (500ma MAX)
• Large 5v terminal with polufuse protection (2A MAX)
• 6 GND terminals
• 1-wire sensors can use parasitic power
• Removable yellow/blue I2C OLED, compatible with SSD1306 simple-to-use libraries
• 2 I2C addresses available for 1-wire master (0x18, 0x19)
• 2 I2C addresses available for OLED (0x78, 0x7A)
• ADC can be configured to use SPI CE0 or CE1 or can use software-SPI
• All connections have high-quality screw terminals for reliability
• Polyfuse on 3.3v and 5V lines for input/output protection

1-Wire Master DS2482-800

• I2C Host Interface Supports 100kHz and400kHz I2C Communication Speeds
• 8 Channels of Independently Operated 1-Wire I/O
• 1-Wire Master I/O with Selectable Active or Passive 1-Wire Pullup
• Provides Reset/Presence, 8-Bit, Single-Bit, and 3-Bit 1-Wire I/O Sequences
• Standard and Overdrive 1-Wire Communication Speeds
• Three Address Inputs for I2C Address Assignment (2 addresses available, 0x18* and 0x19)
• Minimizes Line Noise, Reducing System EMI
• Slew-Controlled 1-Wire Edges
• Supports EEPROMs, Temp Sensors, or Other 1-Wire Slaves That Have Momentary High Source Current Modes
• Strong 1-Wire Pullup Provided by anInternal Low-Impedance Signal Path
• PCTLZ Output to Optionally Control an External MOSFET for Stronger Pullup Requirements

MCP3208 Analog to Digital Converter

• 12-bit resolution
• ± 1 LSB max DNL
• ± 1 LSB max INL (MCP3204/3208-B)
• ± 2 LSB max INL (MCP3204/3208-C)
• 4 (MCP3204) or 8 (MCP3208) input channels
• Analog inputs programmable as single-ended or pseudo-differential pairs
• On-chip sample and hold
• SPI serial interface (modes 0,0 and 1,1)
• Single supply operation: 2.7V - 5.5V
• 100 ksps max. sampling rate at VDD = 5V
• 50 ksps max. sampling rate at VDD = 2.7V
• Low power CMOS technology:
• 500 nA typical standby current, 2 µA max.
• 400 µA max. active current at 5V

0.96 Inch 128X64 Yellow/Blue OLED module

• OLED self-luminous, no backlight
• Size: 0.96”
• Driver IC: SSD1306
• Voltage: 3.3V-5V DC
• Viewing angle: > 160°
• High resolution: 128 x 64
• Working Temperature: -30°C~70°C
• Display Colors: 2 rows of yellow, 6 rows of blue
• Module Size: 27mmx 27mm x 4mm
• Screen material: glass
• 4-pin Interface: GND, VCC, SCL, SDA

This board ships with headers and connectors un-soldered. Some light soldering is required to complete the HAT. You can optionally elect to have the board shipped to you full-assembled by selecting the option on the right.

RESOURCES

OLED (SSD1306) Library for Raspberry Pi HERE

1-Wire Python example for Raspberry Pi HERE

1-wire OWFS examples for Raspberry Pi HERE and HERE

MCP3208 examples for Raspberry Pi HERE or HERE