Circuit Design, Inc. List of Products and Services

The "SLR-429M" is an embedded wireless module designed for ease of use. In addition to the LoRa mode, which enables ultra-long-range communication at low bit rates, it also features a conventional FSK mode. It achieves LPWA via LoRa with a completely proprietary protocol in the 429MHz band, which is designed solely for circuit applications. The 429MHz band has superior diffraction characteristics compared to the 920MHz band, allowing for stable communication in various environments such as indoors, mountainous areas, along rivers, and underground. It connects to external microcontrollers or PCs via a UART interface. This is a specific low-power wireless module that requires no license and incurs no communication fees. 【Features】 ■ Communication distance: over 10km line of sight ■ Communication speed: 245bps ■ Capable of communication with up to 8 contact points ■ Superior diffraction characteristics compared to the 920MHz band *You can purchase directly from the related links. Orders starting from one unit are also welcome!

The SLR-429M-RS2 is an RS232C interface board equipped with the SLR-429M. Since it is equipped with the SLR-429M, which has obtained the Technical Regulation Conformity Mark (Type Approval), a license for the radio station is not required. It can be connected to the D-Sub-9 pin COM port of a computer or PLC. Additionally, it features transmit and receive LEDs, a power terminal, and a power switch. You can easily check the communication performance of the SLR-429M in combination with the evaluation program. 【Features】 ■ Equipped with SLR-429M ■ Connects to the COM port of a computer ■ Simple communication distance tests can be conducted with an optional SW/LED board

MLR-429 is a wireless module that focuses on serial communication, pursuing miniaturization and ease of integration. In addition to conventional FSK mode communication, it features a LoRa mode that enables ultra-long-range communication at low bit rates. In LoRa mode, it achieves communication distances of over 10 km in line of sight, despite having a low transmission power due to excellent reception sensitivity. It connects to external microcontrollers or PCs via a UART interface, allowing for the transmission and reception of customer data and device control using our unique command system developed in the industrial sector. It can be used for data transmission and telemetry applications. 【Features】 ■ Equipped with Technical Compliance Mark ■ Ultra-long-range data communication in the 429 MHz band using LoRa mode ■ Compact size ■ Compatible with LTM-1

The MU-3-429 is a command control wireless modem that can interface with the UART of a one-chip CPU or the COM port (RS232C) of a computer. It has obtained the Technical Compliance Mark, allowing it to be used without a radio station license or registration. Thanks to its optimized RF circuit, it achieves stable operation over a wide temperature range, long-distance communication, and low voltage/low power consumption. It is equipped with a powerful error correction function using Reed-Solomon coding, enabling the construction of a reliable system. You can select the frequency band according to your application and communication environment. 【Features】 ■ Obtained Technical Compliance Mark (Construction Design Certification) ■ Simple dedicated commands common to the series for serial data transmission ■ Relay function (up to 10 stations) ■ Powerful error correction function

The MU-3-1216 is an intelligent modem capable of command control that operates in the 1216MHz band, which provides a relatively low-noise and clean radio environment. It can be controlled using a common command system shared with other MU series models and is compact in size, similar to the 429MHz band. Depending on the application and communication environment, you can choose the frequency band. Thanks to excellent RF circuit technology, it achieves stable operation over a wide temperature range, long-distance communication, low voltage operation, and low power consumption. 【Features】 ■ Acquired Technical Standard Mark (Construction Design Certification) ■ Simple dedicated commands common to the series for serial data transmission ■ Relay function (up to 10 stations)

The MU-4-429 is an intelligent modem for command control that can interface with one-chip CPU UARTs and computer COM ports (RS232C). It is compatible with the command and protocol of the conventional MU-1(N)-429, MU-2-429, and MU-3-429, allowing for easy integration into systems that use these wireless modems. The MU-4-429 is equipped with powerful error correction capabilities, achieving more stable communication. It is compatible with the pin, command, and air protocol of the MU-2-429, allowing for direct replacement and use. 【Features】 ■ Obtained Technical Conformity Mark (Construction Design Certification) ■ Simple dedicated commands for serial data transmission ■ Compact body (55% of the volume of MU-3-429) ■ Powerful error correction function

MU3-RS2-429 and MU3-RS2-1216 are RS232C interface boards equipped with MU-3. They can be connected to a computer's COM port or RS232C devices. You can choose between the 429MHz band or the 1216MHz band. You can easily check the communication performance of MU-3 in combination with the evaluation program. 【Features】 ■ Equipped with MU-3 ■ Connects to a computer's COM port

The MU3-USB-429 and MU3-USB-1216 are USB interface boards equipped with the MU-3. They use the FTDI FT8U232BM USB-UART conversion chip. The power for the MU3-USB is supplied from the USB interface, so no external power source is required. You can choose between the 429MHz band and the 1216MHz band. You can easily check the communication performance of the MU-3 in combination with the evaluation program. 【Features】 ■ Equipped with MU-3 ■ Power supplied from USB interface ■ Recognized as a virtual COM port

MU4-RS2-429 is an RS232C interface board equipped with MU-4-429. It can be connected to a computer's COM port or RS232C devices. You can easily check the communication performance of the MU-4-429 in combination with the evaluation program. 【Features】 ■ Equipped with MU-4-429 ■ Connects to a computer's COM port

The MU4-USB-429 is a USB interface board equipped with the MU-4-429. It uses the FTDI FT8U232BM USB-UART conversion chip. The power for the MU4-USB-429 is supplied from the USB interface, so no external power source is required. You can easily check the communication performance of the MU-4-429 in combination with the evaluation program. 【Features】 ■ Equipped with MU-4 ■ Power supplied from USB interface

The STD-503 is a compact, embedded wireless transceiver module designed for industrial applications that require stability and reliability, operating in the 2.4GHz ISM band available worldwide. It operates on battery power and achieves wireless communication with a line-of-sight range of 300 meters. To ensure reliable wireless communication in the 2.4GHz band, it features a spectrum direct sequence spread spectrum (DSSS) method that excels in noise resistance, along with a true diversity reception function that prevents signal drop due to multipath fading. Additionally, the transparent data input/output interface allows users with their own communication protocols to use it without changing their protocols. It is a highly flexible interface that can transmit continuous LOW or HIGH signals without restrictions. The communication settings for the STD-503 can be configured via serial communication (UART). 【Features】 ■ Spectrum Direct Sequence Spread Spectrum (DSSS) ■ Transparent Data Input/Output Interface (Clock Synchronized) ■ True Diversity Reception

Equipped with the nRF9160 from Nordic Semiconductor. LTE-M is a best-effort type of communication using carrier lines. This module has the Serial LTE modem and MCUBoot loader included in the nRF Connect SDK written to it. Operation is performed by issuing AT commands via UART. Please check the version of the Serial LTE modem written in the communication module using the AT#XSLMVER command and use the commands corresponding to that version. For information regarding the firmware license, please refer to the following: https://github.com/nrfconnect/sdk-nrf/blob/main/LICENSE License ID: LicenseRef-Nordic-5-Clause. Please be aware that we cannot address any issues arising from the firmware. * Please note that a SIM card (nano SIM) is required for the use of this product, so we ask that you contract for one.