The Waveshare NB-IoT / Cat-M(eMTC) / GNSS HAT is a hardware module designed for Narrowband IoT (NB-IoT), Cat-M (eMTC), and GNSS (Global Navigation Satellite System) applications. This HAT (Hardware Attached on Top) for Raspberry Pi enables communication with cellular networks and includes GNSS for location-based services. To address your question about generating and catching frequencies to identify devices, let's break down the capabilities of the module: NB-IoT and Cat-M(eMTC): Generating Frequencies: NB-IoT and Cat-M operate in specific frequency bands allocated by regulatory bodies. These modules do not generate frequencies but rather communicate with base stations in designated bands. Identifying Devices: Each device connected to an NB-IoT or Cat-M network is assigned a unique identifier (IMSI, International Mobile Subscriber Identity). The network infrastructure handles device identification. GNSS (Global Navigation Satellite System): Generating Frequencies: GNSS receivers do not generate frequencies. They receive signals from satellites in multiple frequency bands (GPS, GLONASS, Galileo, etc.). Identifying Devices: GNSS modules provide location information (latitude, longitude, altitude). They do not have unique identifiers in the same way as cellular devices, but you can differentiate devices based on their reported location. The Waveshare NB-IoT / Cat-M(eMTC) / GNSS HAT itself does not generate frequencies for identification. It communicates with existing cellular networks and receives signals from GNSS satellites. The identification of devices in cellular networks is managed by the network infrastructure, and GNSS provides location-based information. If you are looking for device identification within a local network or between devices using the same HAT, additional software and protocols would be needed. For example, you might consider implementing a communication protocol or using unique identifiers within your application to differentiate devices using this HAT on a local level. Link: 1. https://thinkrobotics.com/products/waveshare-sim7080g-gnss-hat-for-raspberry-pi-online?variant=39537045438550&currency=INR 2. https://www.electronicscomp.com/waveshare-nb-iot-cat-memtc-gnss-hat-for-raspberry-pi-globally-applicable?gad_source=1