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Description
Industrial Control Board Communication Device Supports WiFi / Bluetooth Built-In Multiple Protection Circuits, 321541. Microcontroller: ESP32 S3 (default is ESP32 S3R8 chip) 2. Wireless communication: 2. 4GHz Wi Fi (802. 11 b g n), Bluetooth 5 (LE) 3. USB interface: Interface type: Type C Power supply voltage: 5V Functions: power supply for the device, USB communication, firmware download, etc. 4. Isolated RS485 communication interface: Interface type: terminal block Direction control: automatically controlled by the main control hardware flow setting Interface
1. Microcontroller: ESP32-S3 (default is ESP32-S3R8 chip)
2. Wireless communication: 2.4GHz Wi-Fi (802.11 b/g/n), Bluetooth 5 (LE)
3. USB interface:
- Interface type: Type-C
- Power supply voltage: 5V
- Functions: power supply for the device, USB communication, firmware download, etc.
4. Isolated RS485 communication interface:
- Interface type: terminal block
- Direction control: automatically controlled by the main control hardware flow setting
- Interface protection: provides TVS diode protection, surge and static protection
- Matching resistance: default NC, reserved 120R matching resistor, can be enabled by jumper cap
5. Isolated CAN communication interface:
- Interface type: terminal block
- Direction control: hardware automatically determines and controls the data transmission direction
- Interface protection: provides TVS diode protection, surge and static protection
- Matching resistance: default NC, reserved 120R matching resistor, can be enabled by jumper cap
6. Indicator lights:
- PWR: power indicator light, connected to USB, turns red when voltage is detected
- RS485: RS485 indicator light: Green when data is sent from the RS485 interface, blue when data is sent back from the RS485 interface
- CAN: CAN indicator light, flashes when data communication exists at the CAN interface
7. Terminal power supply range: 7V - 36V
8. Shell: rail-mounted protective shell
9. Size: about 9.16 x 2.33 x 5.87cm
Feature:
1. Based on the ESP32-S3 single-chip microcontroller, it is equipped with an Xtensa 32-bit LX7 dual-core processor with a maximum clock frequency of 240MHz
2. It integrates 2.4GHz Wi-Fi and low-power Bluetooth 5 (LE) dual-mode wireless communication, featuring excellent radio performance
3. It has an isolated RS485 interface, facilitating the external expansion of various RS485 Modbus industrial expansion modules or sensors
4. It has an isolated CAN interface, facilitating the external expansion of various CAN devices
5. It has an edge connector interface, allowing for the connection of other devices
6. It has a USB Type-C interface, which can be used for power supply and download debugging, facilitating development use
7. It has an isolated wiring terminal power supply interface, supporting a wide voltage range of 7V - 36V, facilitating the use of industrial power supply ports
8. It has an RTC clock chip, supporting timing tasks
9. It has digital isolation to avoid external signal interference to the control chip
10. It has an integrated power isolation unit, which can provide stable isolated voltage, and the isolated end does not require additional power supply
11. It has RS485 receiver and transmitter indicator lights and CAN operation indicator lights, facilitating the perception of the devices operating status
Specification:
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★★★★★ 4
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This is a great resource. I thought I created great presentations before. Reading this made me realize the mistakes I was making and have me a process for really improving my decks
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Reviewed in the United States on August 29, 2014
★★★★★ 5
So glad that I have bought these books from Amazon
Format: Paperback
Still working on getting through, I try and read more each day
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Reviewed in the United States on November 5, 2025
★★★★★ 5
Must read
Format: Paperback
Impressive second book by Justin Driver.
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Reviewed in the United States on October 1, 2025
★★★★★ 5
Excellent!
Format: Paperback
Excellent read!
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Reviewed in the United States on October 5, 2025
★★★★★ 1
A Disconnected and Legally Shaky Defense of Racial Preferences
Format: Paperback
While this book raises some thought-provoking points, it ultimately reads like a product of self-righteous elites disconnected from reality and from the American public.
1. Ignores public opinion.
The author never acknowledges that polls consistently show Americans oppose racial preferences in college admissions. Proposition 16—which would have allowed such preferences—was defeated by a wide margin in 2020 in California, one of the nation’s most liberal states. A Brookings poll found that virtually all racial groups, including Black respondents, supported the Supreme Court’s Students for Fair Admissions (SFFA) decision.
2. Starts with a strange premise.
The first chapter claims conservatives will “regret” the SFFA ruling because universities will continue racial preferences covertly. But that sidesteps the real question: why shouldn’t colleges comply with the ruling’s letter and spirit?
3. Offers dubious legal advice.
In Chapter Three, the author—himself a law professor—floats risky ideas for “working around” the Supreme Court’s decision. Many of these suggestions rest on shaky legal ground, as anyone familiar with the Second Circuit’s CACAGNY v. Adams, 116 F.4th 161 (2d Cir. 2024), would recognize.
4. Ignores proportionality and real-world outcomes.
The book argues for “diversity” preferences without asking how much preference is justified. In reality, Asian American applicants face steep penalties. e.g. Stanley Zhong was rejected by five University of California campuses’ Computer Science programs as an in-state applicant—shortly before Google hired him for a full-time, Ph.D.-level software engineering position. Meanwhile, UC San Diego’s own freshman math-placement data show a surge of students—mostly “underrepresented minorities” favored by UC—placed into remedial courses, some testing at a 4th-grade level. It is hard to see how admitting these students is helping them other than allowing some elites to make themselves feel good or get a promotion.
If this book represents what passes for legal scholarship at Yale, the state of American legal education should worry us all.
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Reviewed in the United States on October 12, 2025