How To Choose Central And Peripheral In BLE Communication? Home » Arduino Ble Central And Peripheral » How To Choose Central And Peripheral In BLE Communication? Maybe your like Arduino Ble Characteristic Writevalue Arduino Ble Client Example Arduino Ble Device.h Arduino Ble Eeprom Arduino Ble Example Github How to choose central and peripheral in BLE communication? Projects Networking, Protocols, and Devices kodyds January 25, 2022, 2:29pm 1 Below are the abstract of some information I have known so far: When a Bluetooth® connection is established, one device, the peripheral, will advertise or broadcast information about itself to any near devices. At the same time, another device, the central, will be performing a scan and will be listening for any device or devices that are broadcasting information. As soon as the central device picks up the advertising information from the peripheral device, an attempt to connect the peripheral device will be made. There are three ways data can be exchanged between two connected devices: reading , writing , or notifying . However, neither of these information tells how to choose which device as central, and which device as peripheral practically. Assume I have a ESP32, and 2 Arduino nano BLE sense. I want the nanos to send sensor data to ESP32. Also, I want sometime ESP32 would send some signal like "on" or "off", which obtain from WiFi, to nanos. How should I configure them as central or peripheral? J-M-L January 25, 2022, 4:33pm 2 I like to think in terms of functions: I would keep as peripheral the devices capturing the sensor data and the central would be where data is aggregated / exported / analysed. a bit more on the terminology (my cheat sheet); BLE roles can be viewed at 3 specific moments: pre-connection, when connecting and post-connection and you'l find specific vocabulary to describe the roles. Pre-connection: You indeed need to define the role ( peripheral or a central) A peripheral advertises itself and awaits for a central to connect to it A central looks (scan) for other devices when connecting: The peripheral becomes known as a slave and the central as a master Post-connection: Both can be either a client (accesses remote resources) or a server (provides resources) In the typical scenario, the client is the master (central) and the server is the slave(peripheral) resources on the server are available in a hierarchy profiles/services/characteristics The client can send read and write requests to the server which responds with data (and update its data hierarchy when needed). The server can send data to the client without a read/write request using indicate (to be acknowledged by the client ) and notify (without ack) operations 2 Likes system Closed July 24, 2022, 4:34pm 3 This topic was automatically closed 180 days after the last reply. New replies are no longer allowed. Related topics Topic Replies Views Activity Simultaneous Central & Peripheral roles on one device? Nano 33 BLE 10 4591 May 7, 2021 BLE peripheral and central at the same time Programming 4 1807 October 2, 2021 Sending string to Nano 33 BLE via MIT App Inventor....Central or Peripheral? Programming 2 696 October 8, 2022 Arduino Nano BLE Confusion Nano 33 BLE 7 1017 December 4, 2023 Nano BLE swarm Nano 33 BLE 12 1644 August 26, 2021 Tag » Arduino Ble Central And Peripheral Simultaneous Central & Peripheral Roles On One Device? ArduinoBLE - BLE.central() - Arduino Reference BLE Central Support Added To ArduinoBLE | Arduino Blog BLE Peripheral And Central At The Same Time - Arduino Forum Nano 33 BLE Peripheral --> Central Comms - Arduino Forum CurieBLE Library | Arduino Documentation ArduinoBLE - Arduino Reference Control LED Status Using BLE Peripheral And Central Devices On ... BLE Peripheral Examples - GitHub Pages ArduinoBLE V1.1.0 Adds BLE Central Support ArduinoBLE/o At Master · Arduino-libraries ... Connect 4 Peripherals To One Central #185 - GitHub Communication Entre ARDUINO NANO 33 BLE SENSE? Central And Peripheral Roles - V3.1 - Bluetooth API Documentation ...