ComfilePi User’s Manual Certifications(CE · KCC · UL) Migration Documentation The Raspberry Pi is an excellent single-board computer on its own. However, it does not have strong protection against electrical surges, ESD, and static electricity, making it unsuitable for direct use in industrial environments. ComfilePi is specifically designed to overcome these limitations, enabling the Raspberry Pi to be used safely and reliably in industrial applications. It integrates industrial-grade power input, protection circuits for I/O signals, and robust ESD and surge protection to withstand harsh electrical conditions commonly found in factories and control panels. In addition, ComfilePi is housed in a durable enclosure with a water-resistant front panel, supports wide-range DC power input, and provides stable long-term operation for 24/7 industrial systems. This allows developers and system integrators to leverage the flexibility of the Raspberry Pi platform while meeting the reliability and safety requirements of industrial environments. Model CPi-C070WR4C CPi-S070WR System SoC / CPU Broadcom BCM2711 quad-core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz Compute Module CM4 Compute Module 4S (CM4S) Operating System Raspberry Pi OS preinstalled Thermal Heatsink Larger externally exposed heatsink Display LCD 7" LCD (800 × 480, 550 cd/m²) Touch Screen Touch Type Pressure-sensitive Touch Screen (Resistive Film Type) Memory RAM 2GB 1GB / 2GB / 4GB / 8GB (Optional) I/O Interface GPIO GPIO × 20 via 26-pin header GPIO × 22 (includes ESD protection circuit), 40-pin header USB USB × 3 (USB 2.0) + 1 eMMC programming port USB Boot Supports booting from USB out of the box Ethernet 10 / 100 Mbps RS-232C 1 RS-485 1 I2C 1 Buzzer Electro-magnetic buzzer Audio Output Stereo audio output WiFi USB dongle required Power Power Input DC 12 ~ 24V Protection Front Panel Water-resistant front panel (IP65) Environment Operating Temperature 0°C ~ 60°C Storage Temperature -30°C ~ 80°C Certification Certification CE, KCC CD, KCC, UL CPi-C070WR4C can utilize the CP-IO13-4C I/O board, which provides 7 DC inputs, 6 NPN transistor outputs, and 2 additional RS-232C ports. The sunlight-readable LCD supports 7 inches and 1000 candelas and is available as a special order option.    FAQ Q: It looks similar to the CPi-S series. What’s the difference?A: Both are based on the Raspberry Pi 4 platform, but they differ in the Compute Module used. The S series uses the CM4S, which has the same pin map as the earlier CM3. In contrast, the C series uses the standard CM4 board-type module. Q: Why did you create such a complex product classification?A: This was because the new CM4 did not maintain pin compatibility with the previous CM3.As a result, products adopting the CM4 required a completely new board design, which caused difficulties for existing users who were using CM3-based systems due to compatibility issues.To address this, the CM4S was later introduced, restoring pin compatibility. The S series was therefore designed to use this CM4S module. Q: So which one should I choose?A: The answer is simple. For new projects, choose the C series, which is based on the CM4. If you already have a product in mass production based on CM3, choose the S series for compatibility.  Item CPi-S Series (CM4S) CPi-C070WR-4C (CM4)   Compute Module            RAM   1GB, 2GB, 4GB, or 8GB   2GB   I/O Expansion Board   CP-IO22, CP-IO19R, CP-IO22-A4-2   CP-IO13-4C   Screen size type   7", 10.2", 10.4", or 15"   7"   Certification   CE, KCC, UL   CE, KCC   Q: A friend of mine is using a regular Raspberry Pi with an LCD kit. What’s the difference? A: We’re very familiar with that setup. On a desk or in a lab environment, it usually works just fine. The question is whether it can reliably operate in an industrial environment. Industrial sites are harsh. There’s dust, electrical noise, unstable power, and constant vibration. On top of that, you often have large motors running nearby, generating significant interference. ComfilePi is not a hobby platform—it’s a purpose-built industrial product designed specifically to operate under these conditions. It uses industrial-grade components and comes with the necessary certifications required for real-world industrial deployment. That’s the real difference: a general-purpose Raspberry Pi solution that works well in controlled environments versus an industrial platform engineered for long-term, reliable operation on the factory floor. Q: Do you have any real-world examples? A: Yes—there are many, and they are already in active use. For example, a public water authority in …