1.. _bt510:
2
3Ezurio Sentrius BT510 Sensor
4############################
5
6Overview
7********
8
9The Sentrius™ BT510 Sensor is a battery powered, Bluetooth v5 Long Range integrated sensor that uses a Nordic Semiconductor nRF52840 ARM Cortex-M4F CPU.
10
11The sensor has the following features:
12
13* :abbr:`ADC (Analog to Digital Converter)`
14* CLOCK
15* FLASH
16* :abbr:`GPIO (General Purpose Input Output)`
17* :abbr:`I2C (Inter-Integrated Circuit)`
18* :abbr:`MPU (Memory Protection Unit)`
19* :abbr:`NVIC (Nested Vectored Interrupt Controller)`
20* :abbr:`PWM (Pulse Width Modulation)`
21* RADIO (Bluetooth Low Energy and 802.15.4)
22* :abbr:`RTC (nRF RTC System Clock)`
23* Segger RTT (RTT Console)
24* :abbr:`UART (Universal Asynchronous Receiver-Transmitter)`
25* :abbr:`WDT (Watchdog Timer)`
26
27.. figure:: img/bt510.jpg
28     :align: center
29     :alt: Sentrius BT510 Sensor, front view
30
31     Sentrius BT510 Sensor, front view
32
33.. figure:: img/bt510_back.jpg
34     :align: center
35     :alt: Sentrius BT510 Sensor, rear view
36
37     Sentrius BT510 Sensor, rear view
38
39More information about the board can be found at the
40`Sentrius BT510 website`_.
41
42Hardware
43********
44
45Supported Features
46==================
47
48The BT510 Sensor supports the following
49hardware features:
50
51+-----------+------------+----------------------+
52| Interface | Controller | Driver/Component     |
53+===========+============+======================+
54| ADC       | on-chip    | adc                  |
55+-----------+------------+----------------------+
56| CLOCK     | on-chip    | clock_control        |
57+-----------+------------+----------------------+
58| FLASH     | on-chip    | flash                |
59+-----------+------------+----------------------+
60| GPIO      | on-chip    | gpio                 |
61+-----------+------------+----------------------+
62| I2C(M)    | on-chip    | i2c                  |
63+-----------+------------+----------------------+
64| MPU       | on-chip    | arch/arm             |
65+-----------+------------+----------------------+
66| NVIC      | on-chip    | arch/arm             |
67+-----------+------------+----------------------+
68| PWM       | on-chip    | pwm                  |
69+-----------+------------+----------------------+
70| RADIO     | on-chip    | Bluetooth,           |
71|           |            | ieee802154           |
72+-----------+------------+----------------------+
73| RTC       | on-chip    | system clock         |
74+-----------+------------+----------------------+
75| RTT       | Segger     | console              |
76+-----------+------------+----------------------+
77| UART      | on-chip    | serial               |
78+-----------+------------+----------------------+
79| WDT       | on-chip    | watchdog             |
80+-----------+------------+----------------------+
81
82Connections and IOs
83===================
84
85LED
86---
87
88Two LEDs are visible through the BT510 housing lid.
89
90* LED_1A (green) = P0.22
91* LED_1B (red) = P0.20
92
93Push button
94------------
95
96The BT510 housing lid also acts as a push button.
97
98* BUTTON_1 = SW1 = P1.10
99
100Magnetoresistive sensor
101-----------------------
102
103The BT510 incorporates a Honeywell SM351LT magnetoresistive sensor. Refer to the `Honeywell SM351LT datasheet`_ for further details.
104
105* MAG = P1.14
106
107Accelerometer
108-------------
109
110The BT510 incorporates an I2C ST Microelectronics LIS2DH accelerometer. Refer to the `ST Microelectronics LIS2DH datasheet`_ for further details.
111
112* SDA = P0.26
113* SCL = P0.27
114* INT_1 = P1.05
115* INT_2 = P1.12
116
117Temperature Sensor
118------------------
119
120The BT510 incorporates an I2C Silabs SI7055 temperature sensor. Refer to the `Silabs 7055 datasheet`_ for further details.
121
122* SDA = P0.26
123* SCL = P0.27
124
125Programming and Debugging
126*************************
127
128Applications for the ``bt510`` board configuration can be built, flashed, and
129debugged in the usual way. See :ref:`build_an_application` and
130:ref:`application_run` for more details on building and running.
131
132The BT510 features a TagConnect 10 way socket for connection of a
133programmer/debugger, refer to `TagConnect TC2050 product page`_
134for details of an appropriate TagConnect cable.
135
136A non-standard layout is used to include access to the sensor debug UART.
137
138+-----------+------------+----------------------+
139| Pin No.   | Name       | Description          |
140+===========+============+======================+
141| 1         | Vcc        | Power Supply, 3.3V   |
142+-----------+------------+----------------------+
143| 2         | SWDIO      | SWD Data             |
144+-----------+------------+----------------------+
145| 3         | RXD        | Debug UART RX Data   |
146+-----------+------------+----------------------+
147| 4         | SWDCLK     | SWD Clock            |
148+-----------+------------+----------------------+
149| 5         | TM         | Spare GPIO           |
150+-----------+------------+----------------------+
151| 6         | SWO        | SWD Output           |
152+-----------+------------+----------------------+
153| 7         | N/C        | Not Connected        |
154+-----------+------------+----------------------+
155| 8         | TXD        | Debug UART TX Data   |
156+-----------+------------+----------------------+
157| 9         | GND        | Ground               |
158+-----------+------------+----------------------+
159| 10        | RESET      | Reset, Active Low    |
160+-----------+------------+----------------------+
161
162Connectivity to the programmer/debugger must be modified to match
163the pinout shown above.
164
165Ezurio provide the USB-SWD programming board (750-03239) that supports
166this connector layout, refer to the `USB SWD Programmer product page`_
167.
168
169Flashing
170========
171
172To connect the BT510 board for programming or debugging using the USB-SWD programming
173board, on the programming board set SW6 to the supply out position and SW5 to the 3V3
174position, ensure there is a jumper on J35 and that SW1 is in the debug position, then
175connect the BT510 to the board using the Tag-Connect cable via J3:
176
177.. figure:: img/bt510_prog.jpg
178     :align: center
179     :alt: Sentrius BT510 Sensor connected to programming board
180
181     Sentrius BT510 Sensor connected to programming board
182
183Then build and flash applications as usual (see :ref:`build_an_application` and
184:ref:`application_run` for more details). For example, to flash:
185
186.. code-block:: console
187
188   $ ninja flash
189
190Here is an example for the :ref:`hello_world` application.
191
192First, run your favorite terminal program to listen for output.
193
194NOTE: On the BT510, the UART lines are at TTL levels and must be passed through
195an appropriate line driver circuit for translation to RS232 levels. Refer to the `MAX3232 datasheet`_
196for a suitable driver IC. The USB-SWD programming board has an in-built UART connected
197to the BT510 acting as a USB CDC port, on Linux and Windows 10 this driver should be
198installed automatically, for Windows 7, the MBED driver is required to use the serial
199port - see the `MBED Serial Driver`_ link for details and how to install the driver.
200
201.. code-block:: console
202
203   $ minicom -D <tty_device> -b 115200
204
205Replace :code:`<tty_device>` with the port where the bt510 can be found. For example, under Linux, :code:`/dev/ttyACM0`.
206
207Then build and flash the application in the usual way.
208
209.. zephyr-app-commands::
210   :zephyr-app: samples/hello_world
211   :board: bt510
212   :goals: build flash
213
214Note that an external debugger is required to perform application flashing.
215
216Debugging
217=========
218
219The ``bt510`` board does not have an on-board J-Link debug IC
220as some nRF5x development boards, however, instructions from the
221:ref:`nordic_segger` page also apply to this board, with the additional step
222of connecting an external debugger. The USB-SWD programmer board has a CMSIS debugger
223compatible interface and debugging can be performed using pyocd, openocd or any other
224applications that support the CMSIS interface.
225
226Testing Bluetooth on the BT510
227***********************************
228Many of the Bluetooth examples will work on the BT510.
229Try them out:
230
231* :ref:`ble_peripheral`
232* :ref:`bluetooth-eddystone-sample`
233* :ref:`bluetooth-ibeacon-sample`
234
235
236Testing the LEDs and buttons on the BT510
237*****************************************
238
239There are 2 samples that allow you to test that the buttons (switches) and LEDs on
240the board are working properly with Zephyr:
241
242* :zephyr:code-sample:`blinky`
243* :zephyr:code-sample:`button`
244
245You can build and flash the examples to make sure Zephyr is running correctly on
246your board. The button, LED and sensor device definitions can be found in
247:zephyr_file:`boards/ezurio/bt510/bt510.dts`.
248
249
250References
251**********
252
253.. target-notes::
254
255.. _Sentrius BT510 website: https://www.ezurio.com/iot-devices/iot-sensors/bt510-bluetooth-5-long-range-ip67-multi-sensor
256.. _TagConnect TC2050 product page: https://www.tag-connect.com/product/tc2050-idc-050
257.. _USB SWD Programmer product page: https://www.ezurio.com/wireless-modules/programming-kits/usb-swd-programming-kit
258.. _MAX3232 datasheet: https://www.ti.com/lit/ds/symlink/max3232.pdf
259.. _Silabs 7055 datasheet: https://www.silabs.com/documents/public/data-sheets/Si7050-1-3-4-5-A20.pdf
260.. _ST Microelectronics LIS2DH datasheet: https://www.st.com/resource/en/datasheet/lis2dh.pdf
261.. _Honeywell SM351LT datasheet: https://sensing.honeywell.com/honeywell-sensing-nanopower-series-datasheet-50095501-c-en.pdf
262.. _MBED Serial Driver: https://os.mbed.com/docs/mbed-os/v6.8/program-setup/windows-serial-driver.html
263