There is only a 1-ch UART port on the original Raspberry Pi, once it is used for terminal debugging, no other serial device is allowed. What a poor situation. Now you have 2-ch extra UART, plus 8 programmable GPIOs, just bring this Serial Expansion HAT. The SC16IS752 is an I2C-bus/SPI bus interface to a dual-channel high-performance UART. It also provides the application with 8 additional programmable I/O pins. This module uses an I2C interface by default, and its device address is hardware configurable by A0 and A1. Features: Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards Onboard SC16IS752, expands 2-ch UART and 8 programmable GPIO through I2C, no extra pin required It is stackable up to 16 this module by setting the address jumper, which means up to 32-ch UART Onboard multi LEDs for indicating the UART working status Reserved I2C control pins, allows working with other control boards Comes with development resources and manual (examples in C and python) Package Includes: 1 x Serial Expansion HAT1 x RPi screws pack (2pcs)1 x PH2.0 6PIN wire
Specifications
| Operating voltage | 3.3V |
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| Expansion chip | SC16IS752 |
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| Control interface | I2C |
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| Mounting hole size | 3.0mm |
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| Item Type: | HAT |
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| Compatibility: | Pi Series |
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| HAT Type: | Expansion HAT |
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| Operating Voltage (VDC): | 3.3 |
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| Interface: | I2C |
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| Mounting Hole Diameter (mm) | 3 |
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| Length (mm): | 65 |
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| Width (mm): | 30 |
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| Weight (g): | 16 |
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| Shipping Weight | 0.02 kg |
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| Shipping Dimensions | 7 × 3 × 3 cm |
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