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This is an example to broadcast measured value of BME280 through BLE GATT service.
please refer detail information at GitHub. https://github.com/soramame21/BLE_Server_BME280
Diff: README.md
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- 0:f22fa5cc4d56
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/README.md Fri Apr 14 02:51:57 2017 +0000 @@ -0,0 +1,131 @@ +# BLE_Server_BME280 +This mbed application for BLE GATT server running over TY51822r3 with a builtin BLE shield and wired Bosch BME280 sensor. It broadcasts measured value of temperature, humidity and pressure to BLE GATT client. + +# Getting started with it on mbed OS + +This is a very simple guide, reviewing the steps required to get BLE_Server_BME280 working on mbed OS platform. +Please install [mbed CLI](https://github.com/ARMmbed/mbed-cli#installing-mbed-cli). + +## Get the example application! + +From the command line, clone the example: + +``` +git clone https://github.com/soramame21/BLE_Server_BME280 +cd BLE_Server_BME280 +mbed deploy +``` + +### Now compile + +Invoke `mbed compile` specifying the name of your platform and your favorite toolchain (`GCC_ARM`, `ARM`, `IAR`). For example, for the ARM Compiler 5: + +``` +mbed compile -m TY51822r3 -t ARM +``` + +Your PC may take a few minutes to compile your code. At the end you should get the following result: + +``` +[snip] +Link: BLE_Server_BME280 +Elf2Bin: BLE_Server_BME280 ++-----------------------+-------+-------+------+ +| Module | .text | .data | .bss | ++-----------------------+-------+-------+------+ +| Misc | 17384 | 29 | 404 | +| drivers | 1489 | 8 | 56 | +| features/FEATURE_BLE | 12796 | 38 | 512 | +| hal | 558 | 16 | 0 | +| platform | 1759 | 8 | 92 | +| rtos | 598 | 8 | 0 | +| rtos/rtx | 6598 | 100 | 5036 | +| targets/TARGET_NORDIC | 23070 | 270 | 2423 | +| Subtotals | 64252 | 477 | 8523 | ++-----------------------+-------+-------+------+ +Allocated Heap: unknown +Allocated Stack: unknown +Total Static RAM memory (data + bss): 9000 bytes +Total RAM memory (data + bss + heap + stack): 9000 bytes +Total Flash memory (text + data + misc): 64729 bytes + +Image: .\BUILD\TY51822r3\ARM\BLE_Server_BME280.hex +``` + +### Program your board + +1. Connect your mbed device to the computer over USB. +1. Copy the binary file to the mbed device . +1. Press the reset button to start the program. + +You can verify the output of this application either: + - on a serial terminal for your respective OS + + BME280 data are read and print every second. + + OR + - on a BLE enabled Android device with the Nordic nRF connect app + + You can scan for the "BME280" device and "connect" to it. Upon successful discovery of services, you can enable "notifications" and start getting the sensor's data. + + +Congratulations if you managed to complete this test! + +### Monitoring the application +The application prints debug messages over the serial port, so you can monitor its activity with a serial terminal emulator. Start the [serial terminal emulator](https://developer.mbed.org/handbook/Terminals) and connect to the [virtual serial port](https://developer.mbed.org/handbook/SerialPC#host-interface-and-terminal-applications) +presented by TY51822r3. Use the following settings: + +* 9600 baud. +* 8N1 +* No flow control + +After pressing the **RESET** button on the board, you should be able to observe the application's output as following. + +``` +Inside BLE..starting payload creation.. +ble.gap().startAdvertising() => 0 +1004.25 hPa, 25.64 degC, 24.64 % +1004.28 hPa, 25.64 degC, 24.64 % +1004.25 hPa, 25.64 degC, 24.66 % +1004.30 hPa, 25.64 degC, 24.61 % +``` + +### Discovering BME280 from `nRF Connect` +[Please click this link for reading detail explanation](./img/Discovering.md) + + +## Required hardware +* [TY51822r3 target platform](https://developer.mbed.org/platforms/Switch-Science-mbed-TY51822r3/) + + It is a Bluetooth low energy development board with the Nordic's nRF51822 Rev.3 SoC. + + [Instractions for updating firmware](https://developer.mbed.org/teams/Switch-Science/wiki/Firmware-Switch-Science-mbed-TY51822r3) + + [Latest firmware version](https://developer.mbed.org/media/uploads/asagin/lpc11u35_sscity_if_crc.bin) + +* [BME280 sensor](https://developer.mbed.org/components/BME280-Combined-humidity-and-pressure-se/) + +* Breadboard, wires, 2 registers (2.2k-ohm) and a USB cable. + +## Wiring +BME280 uses I2C interface (SDI/SCK) to communicate with TY51822r3. please refer following table about paired pin wiring between BME280 and TY51822r3. + +| BME280 Pin | TY51822r3 Pin | +|--------------|-----------------| +| 1 SDO | GND | +| 2 SCK | P0_7 scl I2C0 | +| 3 SDI | P0_30 sda I2C0 | +| 4 CSB | VDD | +| 5 GND | GND | +| 6 Vcore | VDD | +| 7 Vio | VDD | + +* SDI and SCK must be pulled-up by 2.2k-ohm registers. + + +## Overview + + + + +Please find the BLE GATT Client application under https://github.com/soramame21/BLEClient_mbedDevConn repo.