DEMO MANUAL DC2126A High-Accuracy Wireless Temperature Sensor with Solar Battery Life Extender Description The DC2126A is a high-accuracy wireless temperature (manager). A switching power supply harvests energy sensor that can be powered from ambient light. It is built from the built-in solar panel, and automatically switches using various integrated circuits from Linear Technology. over to the internal battery when no ambient light is avail- A 24-bit delta-sigma ADC reads a thermistor biased from able. Table 1 shows Linear Technology components used a precision voltage reference. A SmartMesh IP wireless inside the DC2126A along with their function. radio module provides the wireless mesh connectivity and L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and LTP is a trademark of Linear Technology Corporation. All other trademarks are the property of their communicates the temperature to a central access point respective owners. Table 1: DC2126A Components LTC PART NUMBER FUNCTION BENEFITS LTC 2484 24-bit delta-sigma ADC, reads thermistor Easy-Drive inputs allow direct hook-up of thermistor. LT 6654 Low Noise Voltage Reference Bias thermistor for low noise reading of temperature LTP 5901-IPM SmartMesh IP Mote Module Automatically forms low power, reliable wireless mesh network Built-in microprocessor manages ADC and power supplies LTC3330 Energy Harvesting DC/DC Converter Prioritizes between solar power and battery power p dc2126afa 1 hotographsDEMO MANUAL DC2126A What Do i n D Form Wireless n W 1. At Least 3-5 Motes, Operating on the Same To verify that the network ID was programmed correctly, Network ID type the following command: mget netid The DC2126A is a mote (wireless node) in a SmartMeshIP network. Motes perform two functions in the network: Note that a reset command must be issued, or power They are the sensor points that gather information (in cycle the part for this change to take effect. this case, temperature), and they also automatically help route data from other motes through the network, forming 2. Network Manager a mesh network. Because the network functions best if it A network manager (manager) is required to build a can form a mesh of nodes, with multiple paths through the network, and then collect all sensor data. This manager network, we recommend always operating the DC2126A in is responsible for building and maintaining the wireless a network of at least three to five motes. This is most easily mesh network, telling each of the motes when to send, accomplished by adding a DC2126A to a SmartMesh IP when to listen, and at which frequencies. The manager Starter Kit, such as the DC9000B (