Bluetooth Module Shielding Kit For Mac ((LINK))
LINK ::: https://geags.com/2tgLbs
However, after testing the 2014 model, it appears that Apple has significantly improved its Bluetooth shielding on the new Mac mini. Our initial testing indicated an 11-foot increase in range from the 2012 model with the same set up.
My personal experience with the 2014 mini is that it has more severe bluetooth interference than the 2012. My BT mouse and kbd are less than 3ft. away, and mouse movements are very choppy, and connections to both the mouse and kbd would sometimes drop.
Im currently using a gizduino V.3 ( -gizmo.com/KIT/Gizduino.html).. it's working fine..but when i plug the bluetooth shield- EGBT-04S slave only ( -gizmo.com/KIT/BLUETOOTH%20SHIELD.html) to the gizduino, the shield wont work.. The LED1 (green) and LED2 (red) wont blink..
I don't have the shield like you have but the module I bought -module looks similar. It just plugs into arduino 5V, GND, RX & TX and no need for any special arduino software. Just pair computer with it and open terminal window and it just works when arduino does Serial.print.
The Low Power Mode referenced in the following Application Notes are based on running the lp.low.power.deep.sleep.sb sample application which is written specifically for achieving the lowest possible power state of the BL65x module. All of the LEDs on the DVK-BL65x are set to digital out low, the temperature sensor is disabled, and the UART is closed before going into the waitevent. When running the sample application referenced in the document the BL65x module will enter into enter Deep Sleep or Low Power Doze Mode (at waitevent) and achieve the stated low power levels.
Using XON/XOFF software handshake instead.Use not handshake at all but lowering the baud rate significantly. This can prevent buffer overflow to a certain extend but actually depends on your particular application and whether other tasks active on the module would consume processing power.
On Laird Connectivity SmartBasic module, the address type can be set using the function BleSetAddressTypeEx(). On the other hand, Sysinfo$(4) can be used to retrieve the Bluetooth address if it is public or random static. Due to LE privacy 1.2, if the address type is random resolvable or random non-resolvable, it cannot be retrieved by the application layer since it is fully controlled by the baseband layer.
Bluetooth Mesh is a wireless mesh topology and standard which enables many-to-many (m:m) device communication for an enormous number of local BLE devices. It supports large-scale node networks without the need of an ordinary BLE gateway infrastructure. Refer to -bluetooth-mesh-simple and -about-bluetooth/recent-enhancements/mesh for additional information.
Angle of Arrival (AoA) and Angle of Departure (AoD) are two concepts for location positioning and direction finding. Without going into too much detail and to keep things very simple: One of the two BLE devices must have at least two antennas or more, so that the data received from those antennas then can be used to identify the direction and angular position of the location where the Bluetooth signals come from. Please find further information available at -bluetooth-aoaaod-direction-finding and -aoa-aod-bluetooth-capabilities.
The BL654 is BLE v5.1 module which embeds an nRF52840 chipset from Nordic. Laird Connectivity developed smartBASIC, an event driven programming language that sits on top of Nordic SDK. Its most famous software/feature is the AT Commands Interface where you can drive a BLE module through UART with using batch of intuitive commands.
The default behaviour of the SmartBASIC driven BLE modules is entering deep sleep mode when a UART break condition is being detected and wake up through reset when released. While this is a convenient way to reset a module without having access to the reset line e.g., during development when connected with UwTerminalX, it might be unintended in the final application environment.For the more recent SmartBASIC BLE modules like BL652, BL653, BL654, BL654PA the behaviour when detecting a UART break is configurable when opening the UART with UartOpen(). Character 9 in the stOptions string specifies the behaviour and it's possible to chose from entering deep sleep / reset, ignore the break or send an event EVUARTBREAK to the SmartBASIC application. See below table:
The default behaviour is entering deep sleep, hence you would have to close the uart and re-open it at the beginning of your application to apply changes to the behaviour.See the SmartBASIC Extensions User Guides for each module for more details.The BT900 dual-mode BT/BLE module does not offer configurability of the UART break behaviour and will always go to deep sleep and wake up through a reset.
A fast and convenient way to read out the MAC address of each module during a test/production process would be through SWD from FICR (Factory information configuration registers) registers DEVICEADDR and DEVICEADDR. The following command will read the MAC address from our BLE modules:
The BL65x is delivered with the smartBASIC runtime FW loaded and no smartBASIC application. In this configuration the module will boot into smartBASIC Interactive mode and the default pins for the UART at startup are set as per:
BL65x modules can support up to 255 Bytes when using extended advertising. This equates to an advertisement packet being sent on one secondary channel.Extended Advertisement were introduced in Bluetooth SIG v5.0 specification. Advertisement channels 37, 38 and 39 are now qualified as Primary Advertisement Channels with channels 0 to 36 now qualified for use as Secondary Advertisement Channels. Each secondary channel can have up to 255 bytes of payload and the v5.0 specification allows for chaining up to 6 packets for up to 1650 bytes total. However, receiving all of those chained packets may be unreliable resulting in many stack vendors not offering the full chaining capacity.
While it is not possible to open multiple virtual serial port (VSP) connection at a time, it is possible to open more than one regular BLE connection.The SmartBASIC AT interface application provides configuration S registers for setting certain BLE parameters, which are accessible by the ATS command. The default configuration is optimized for establishing one VSP connection with high throughput between two BLE modules. Given this, certain S register have to be modified to accomodate for different applications.The default configuration has set bit 3 in S register 100 (Start-up Flags), which gives max bidirectional throughput of about 127kbps. As a consequence the number of simultaneous BLE connections is being limited to 1. If you want to use more than one non-VSP BLE connections, bit 3 in S register 100 needs to be cleared and then max connections in S register 126 can be increased.
The shelf life statements are essentially to prevent mishandling of the product and not storing it properly. If the modules are still sealed in the package, stored at the proper temperature and have not been exposed to moisture they should be fine. However, when working with modules beyond their shelf life you MUST bake the modules before populating the them to your board. Failure to bake the modules could result in the yield rate dropping down lower than expectation due to popcorn or de-lamination on the modules. It is recommended that you follow IPC/JEDEC J-STD-033 which is the general standard for the handling, packing, shipping and use of moisture/reflow sensitive surface mount devices.
Our main concern is around the castellation/pads which solder the module to the board. It is imperative those pads do not get tarnished, as this would cause soldering issues. Humidity can affect solderability as well, as if there is any excess moisture in the solder on the module, during reflow of the module to the board, steam balls can essentially explode the solder and sometimes result in an open circuit (or possibly a short circuit).
As long as all of the moisture handling and temperature guidelines are being followed you will likely have no issues. It is further recommended that when you do the build with modules that have exceeded their shelf life that you start with a handful to perform a test run and do a final test to make sure all is working as expected. As long as there are no issues with the initial test run we would expect that you will not experience any problems.
Note: Laird recommends you use JTAG (2-wire interface) to handle future BL65x module firmware upgrades. You MUST wire out the JTAG (2-wire interface) on your host design , where four lines should be wired out, namely SWDIO, SWDCLK, GND and VCC. Firmware upgrades can still be performed over the BL65x UART interface, but this is slower (60 seconds using UART vs. 10 seconds when using JTAG) than using the BL65x JTAG (2-wire interface).
The BL652, BL653, and BL654 modules come preloaded with our smartBASIC firmware. When flashing custom firmware using Segger IDE it is necessary to do a full erase of the Laird BL65x module before programming the module. This can be accomplished using the NRFJPROG command line tool to send the command nrfjprog --eraseall.
Bluetooth Low Energy uses Services as opposed to the set of standardized profiles that exists for Classic Bluetooth. While some Bluetooth Low Energy services have been standardized by the Bluetooth SIG, the development of custom services is allowed to meet custom application requirements. Because Bluetooth Low Energy uses a completely different protocol than Classic Bluetooth and supports custom services, Bluetooth Low Energy devices cannot connect to a computer through the typical Bluetooth configuration of a computer. Therefore, connecting to a PC requires writing and running a Bluetooth Low Energy Central Role/Client application to collect the data sent from the Bluetooth Low Energy peripheral modules. Application development for PCs and Mobile devices is outside the scope of our support. Alternatively, a BL654 USB dongle could be used as a BLE Central Role device, to collect the BLE data and pass it to the PC over a COM Port. However, you would still need an application to view and process the data received over that COM Port. We generally recommend customers who are new to Bluetooth Low Energy obtain a copy of Getting Started with Bluetooth Low Energy to help them understand the Bluetooth Low Energy protocol and the GATT table. There are also many resources available online which explain this. 153554b96e