https://community.element14.com/challenges-projects/project14/sub1ghzband/Build any project that uses RF communication on sub-1GHz bands.en-USTelligent Community 12https://community.element14.com/challenges-projects/project14/sub1ghzband/m/managed-videos/148317Tue, 03 Oct 2023 17:48:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:47ee2fdf-a1cf-4685-9e60-f6bf9af45352robogaryPlease refer to the Arduino Nano Wireless Morse Code Key Vers 1 & 2 videos. A wireless Morse Code Keyer, to interface to a amateur HF transceiver, built using: an Arduino Nano and FS1000a 433 MHz transmitter 433MHz receiver using FS1000a and an Ar...https://community.element14.com/challenges-projects/project14/sub1ghzband/m/managed-videos/148303Tue, 26 Sep 2023 19:52:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:e4b79058-c7d7-4ad4-bebd-6fa56163f999navadeepganeshuhttps://community.element14.com/challenges-projects/project14/sub1ghzband/b/blog/posts/project14-subghz---door-lock-app-part1Tue, 26 Sep 2023 19:49:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:313dfd56-c233-4f5c-adbc-81c68dcc9469navadeepganeshuThanks to the SubGHz contest - RF has been on my radar to explore for a while now and using STM32WL is where I got started. The radio drivers and middlewares are quite complex coming to these systems, but the getting started example helped me here. This blog explains my activity building a basic door-lock system prototype using two STM32WL devices one acting as a node put near the door and the other the concentrator or remote device within the radio vicinity(range test activity is to be done next). Thanks to element14 for shipping out a pair of STM32WL55JC1 Nucleo-64 boards for participating in this contest. Here we go: 1. Getting Started Downloading the STM32CubeWL pack is all that is needed to get the skeleton in place which provides Middlewares, Drivers, and Example Programs all documented well to an extent. The examples for usage of each peripheral are helpful in understanding their setup, configuration and testing out features on top of which application programs can be built. I am using a C1 version of this board - EU/US/APAC 868/915/923 MHz and another is C2 which is CN 433/470 MHz. 2. Example Programs Running ping pong example where the master device pings and node gives a response through a pong. Another demo is sensor and concentrator where the concentrator collects the data from the sensor. 3. Door Lock App Plan The idea of this project is to have a ping-pong type of instance where the remote device sends a message to open the door to a node in the vicinity upon a user button press. The node receives and sends the new door status after the reception of the message. The remote will now know the current state of the door and be ready for further commands. While the node also controls a buzzer and solenoid valve linking to a door latch. PING_DOOR_OPEN / PING_DOOR_CLOSE PONG_DOOR_OPEN / PONG_DOOR_CLOSE 4. Implementation Enabling interrupts in STM32CubeMX .ioc file: Adding additional IO pin for the buzzer: ISR: Demo: Here, on a button press in the remote device(indicated by BLUE LED and the node indicates remote's button press with GREEN LED), a ping is sent to the node which pongs the status. The link is established between them in prior and the blue LED in the node device indicates that the device is activated to do the task of opening/closing the door. On the remote side, based on if the door is open/closed, the BLUE LED status changes while node shows it by GREEN LED. A buzzer beeps for an instant of the door left open. community.element14.com/.../2437.20230927_5F00_003133.mp4 5. References and Next steps NUCLEO-WL55JC - STM32 Nucleo-64 development board with STM32WL55JC MCU, SMPS, supports Arduino and morpho connectivity - STMicroelectronics Getting started with STM32CubeWL for STM32WL Series - User manual STM32WL Online Training - STMicroelectronics (this is gem) STM32WL MCU Series: Wireless System-on-Chip Long range communications - YouTube Code repo NavadeepGaneshU/Project14_SubGHz_Phy_App (github.com) Further, I am exploring encryption blocks and LPUART in this module. The activity of running RF range tests and power consumption at different phases of operation will be added next. Let me know what you think and if you have to build ideas with this board!STM32WL55element14stmicroelectronicsproject14SubGHz projecthttps://community.element14.com/challenges-projects/project14/sub1ghzband/m/managed-videos/148300Mon, 25 Sep 2023 08:57:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:a4b97261-60a7-43b4-ac3e-fcd0487930e5rschttps://community.element14.com/challenges-projects/project14/sub1ghzband/b/blog/posts/project14-sub-1ghz-band-challenge---tone_5f00_onMon, 25 Sep 2023 03:30:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:d3772a1f-99b3-4829-ac08-b6427f42c567rscI know it's past the deadline, but I need to post this update. After playing around with the FSK default values, I managed to play a tone from the fox at 433MHz. community.element14.com/.../IMG_5F00_9509.MOV Here's the Audacity view of the audio capture If I zoom in on one of the pulse packets I can see the modulation. Range Test: I walked 0.35 miles (0.56 km) and still had a strong signal on the handheld. I'll need to do a PER test with the laptop in the car next.STM32WL55Sub-1 GHz Band433mhzNUCLEO-WL55JC2amateur radio