A comprehensive review of Maxim's IoT solutions

A collection of wonderful solutions from Maxim Internet of Things

Health platform application solution based on WASP

The health platform is based on Maxim's high-performance Cortex ® -M3 32-bit RISC MCU MAX32600 , combined with Maxim's proprietary heart rate and blood oxygen two-in-one biosensor MAX30101 , the industry's smallest and thinnest high-precision gyroscope and accelerometer 6DoF+3 IMU MAX21100 , Maxim's secure and encrypted NFC MAX66242 , and a highly integrated power manager for low-power wearable devices. The health platform integrates heart rate, blood oxygen saturation, motion, tilt, temperature, and magnetic field measurements, which can help customers quickly develop their own products.

Health Watch

The Health Watch solution provides a low-power, highly integrated wearable health product design platform with a sleek wristband design that integrates Maxim medical terminal devices. This health smart watch is built on Maxim's MAX32600 platform and the latest biosensor MAX30101 , which can monitor heart rate, blood oxygen levels, as well as movement, location, temperature and emotional response. In addition to measuring human vital signs, the health watch also has built-in security features to authenticate the owner as the only user, encrypt private information and prevent tampering attacks. The future development of defensive health care needs to be based on monitoring, and Maxim's Health Watch is a portable design solution that conforms to this healthy lifestyle.

Wearable T-shirts

The wearable T-shirt is a vital signs monitoring suit designed based on Maxim's MAX32600 platform, enabling professional medical staff and users who are eager to understand their health status to monitor various vital signs frequently at a low cost. The highly integrated monitoring suit design can be used to measure three-lead electrocardiogram (ECG), body temperature, respiration, blood oxygen saturation and movement status, and can be connected to a mobile phone via wireless Bluetooth to observe the measurement results. All diagnostic tools have been integrated into the shirt without affecting the wearing comfort.

At Maxim, we use proprietary sensor, RF integration technology, digital processing and micro-power energy harvesting technology to help our customers achieve cost and space advantages. This means reducing system costs through highly integrated modular designs and bringing medical monitoring equipment into the home.

Mobile Payment

The MPOS-STD2 mobile point of sale (MPOS) reference design platform enables payment terminal suppliers to provide consumers with solutions of various sizes and different security levels to meet the needs of the emerging mobile payment market. The platform can greatly reduce R&D costs and speed up the process from product design to PCI certification, thereby accelerating product launch.

The MPOS-STD2 reference platform includes an EMVL1 protocol stack, Bluetooth, and NFC; a complete hardware-accelerated encryption library; and a complete set of security measures that are pre-certified and PCI PTS 4.0 compliant and tested by a third-party lab. The platform also includes a complete mechanical design development kit to further ensure that the user's final product meets PCI standard requirements. Based on the MAX32550 DeepCover ® MPOS system-on-chip (SoC) design, MPOS-STD2 can meet many system-level MPOS terminal requirements, including: integrated encryption and physical security protection, smart card interface, magnetic stripe card reader, TFT and secure keyboard controller, ADC, DAC, and a large number of serial interfaces for additional custom designs. The MAX32550 includes a 108MHz ARM Cortex-M3, 1MB flash, and 256KB NVSRAM.

NFC Solutions

The solution of realizing online reading and payment of three household meters based on dual-interface NFC MAX66242 shows that the user installs an APP application on the mobile phone, uses the mobile phone's NFC reader to read the usage data of the three household meters (water, electricity, and gas meters), and transmits the reading to the online server through the Wifi network. At the same time, the user can also purchase a certain amount of water, electricity, and gas on the mobile phone. The online server generates authorized usage data based on the amount paid by the user, and writes it to the built-in secure memory of the three household meters through the mobile phone.

This solution is based on Maxim's innovative dual-interface NFC chip MAX66242. The internal processor of the household meter accesses the chip through the I2C interface, and the smartphone with an NFC reader connects to the MAX66242 through NFC. The mobile phone connects to the remote network server through its own GPRS, 3G/4G, or WiFi network, thus establishing a communication link between the local household meter and the remote network server. The network server can read the usage data of the user's household meter through the Internet and provide users with online payment functions. Therefore, users can easily buy water, electricity and gas at home without going out, which greatly facilitates residents, reduces the number of meter readers and financial personnel of the service company, reduces the number of business outlets, and greatly reduces the operating costs of the service company.

SHA-2 Authentication Scheme

This demo board is powered by a mini USB cable and is mainly used to demonstrate how to generate keys, download host keys, download slave keys, and verify whether the keys are correct. By operating the four buttons on the board and combining the computer demonstration video, designers can clearly understand how the Maxim encryption chip works and its security encryption level.

Press the first button, the development board will automatically generate a master key using random numbers; press the second button, the MCU ( MAXQ622 ) will download the generated master key to the coprocessor ( DS2465 ); press the third button, the key is downloaded to the authentication device ( DS28E15 ); press the fourth button in the middle, the authentication device compares and authenticates the host key. Since random numbers are always involved in the communication between the host and the authentication device, it is impossible for counterfeiters to crack the key by detecting the waveform and power consumption on the data line. In addition, the DS28E15 uses Maxim's dedicated DeepCover® embedded security solution, which provides the system with the most secure key storage through multiple layers of advanced physical protection, effectively protecting sensitive data, so it is particularly suitable for IoT applications with high data security.

PoE (Power over Ethernet) LED lighting

This demo demonstrates an LED lighting solution that draws power from Ethernet and adjusts brightness through Bluetooth. In terms of the power supply link, the power on the network cable passes through Maxim's PD controller chip MAX5969A and is sent to the LED driver circuit MAX16832C to drive the LED lamp. The MAX16832C can withstand an input voltage of 65V, meeting the requirements of Ethernet power supply. In terms of the control signal link, after the Bluetooth module on the circuit board receives the Bluetooth control signal from the mobile phone (Android or iPhone) APP, it outputs the brightness control signal from the UART port of the Bluetooth module. The UART-PWM conversion circuit on the board converts the brightness control signal into a 200Hz PWM signal and sends it to the LED driver circuit MAX16832 to adjust the brightness of the LED. This demo circuit uses the MAX15062 DC-DC circuit to convert the higher Ethernet power supply voltage into a lower 3.3V voltage to power the Bluetooth module and other circuits.

This demonstration solution has the following advantages:

• Safety: The voltage of Ethernet power supply is much lower than the mains voltage, and PoE power supply equipment has perfect protection measures. PoE-powered LED lighting is safer than mains-powered LED lighting;

• Easy installation: There are a lot of Ethernet ports in the office. A network cable can power the demo without a power transformer.

• Easy to operate: Through the Android or iPhone APP, you can easily control the switch and brightness of the light. The Demo also has an external control interface, which allows developers to use their favorite Bluetooth module or WiFi module.