Smart Werables
Q. Availability of APPs and upper computer software for testing.
A. We can provide test APPs(including iOS and Android).
Q. How is the stability of the module?
A. Regarding the stability, we’ll test every piece of module and we ship about 200Kpcs Bluetooth modules every month, the stability of the modules aren’t problems, but we need to consider the application, product structure, external interference, etc..
Q. Do you provide development materials?
A. Yes, we’ll provide all the development files.
Q. What are the communication distance of modules with PCB antennas?
A. The general communication distance outdoors is around 100m, indoors is around 10m.
Q. Can your Bluetooth modules communicate with other manufacturers’ Bluetooth modules?
A. Currently, our modules can only communicate with our own modules and cannot communicate with modules from other manufacturers.
Q. Can we develop the firmware and burn into the module? Is there any write protection or something?
A. Yes, you can develop the firmware and burn into the module, but you need to unlock the chip before you burn you own firmware.
Q. What are the suggestions when drawing the board?
A. About the layout recommendations 1) the module is best placed on the corners, antenna parts facing outward, the antenna underneath the copper pavement wiring, it is best to dig hollow processing; 2) module antenna periphery as far away as possible from large capacitors and batteries to reduce RF interference; 3) If the antenna headroom size, the board space is enough, it is best to leave at least 2mm on each side
Recommended module mounting example:
- Please do not place any metal components in blue shaded space (*1), such as signal line and metal chassis as possible except for the mainboard while mounting the components in *1 space on the mainboard is allowed except for no copper plating area (*2).
- (*2) This area is a routing prohibited area on the mainboard. Please do not place any copper on any layer.
- (*3) Characteristics may deteriorate when GND pattern length is less than 30mm. It should be as 30 mm or more as possible.
- For the best Bluetooth range performance, the antenna area of the module shall extend 3 mm outside the edge of the mainboard, or 3 mm outside the edge of a ground plane. The ground plane shall be at least 5 mm from the edge of the antenna area of the module.
- All module GND pins MUST be connected to mainboard GND. Place GND vias close to module GND pads as possible. Unused PCB area on a surface layer can be flooded with copper but place GND vias regularly to connect copper flood to inner GND plane. If GND floods copper underside the module then connect with GND vias to inner GND plane.
- Even when the above-mentioned condition is satisfied, communication performance may be significantly deteriorated depending on the structure of the product. Bluetooth range performance is degraded if a module is placed in the middle of the mainboard.
- For mainboard layout:
- Avoid running any signal line below the module whenever possible.
- No ground plane below the antenna.
- If possible, cut off the portion of the main board below the antenna.
Other modules mounting example:
Placement of resin or plastic parts:
Placement of metal parts
- The minimum safe distance for metal parts without seriously compromising the antenna (tuning) is 40 mm top/bottom and 30 mm left or right.
- Metal close to the module antenna (bottom, top, left, right, any direction) will have degradation on the antenna performance. The amount of that degradation is entirely system-dependent, meaning you will need to perform some testing with your host application.
- Any metal closer than 20 mm will begin to significantly degrade performance (S11, gain, radiation efficiency).
- You should test the range with a mock-up (or actual prototype) of the product to assess the effects of enclosure height (and materials, whether metal or plastic).
Q. Where can I get some?
A. Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry’s standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
Sensor Tag
Q. Can the mobile app send and receive data at the same time?
A. Yes
Q. Questions about Bluetooth pairing , can I pair with the system Bluetooth, what is the reason?
A. Dual-mode Bluetooth can pair with system Bluetooth, but single-mode Bluetooth can’t.
Q. What is the communication method with the MCU?
A. Usually via UART.
Q. What are the general parameters of PCB on-board antenna?
A. Impedance: 50Ω, Peak Gain: 3.0dBi.
Q. Is the external crystal of CC2540 module 32MHz?
A. CC2540 module has two crystals, one is 32MHz, another one is 32.768KHz.
Q. Commonly used Bluetooth test APPs, which ones support hexadecimal data?
A. Android: nRFconnect; iOS: nRFconnect, Lightblue.
Q. How do slave modules automatically reconnect with the master module?
A. Only the master can initiate the connection, so it is necessary to set up an automatic reconnection mechanism of the master, such as setting up an automatic reconnection mechanism in the mobile app or setting up an automatic reconnection mechanism in the MCU.
Q. How can a master module connect to multiple slave modules at the same time?
A. The master module to do polling communication mechanism, time-sharing communication, round-robin connection, that is, for example, A is the master, 123 are slaves, and then A and 1 connect, disconnect after communication. Do the same actions with 2 and 3.
Bluetooth Beacon
Q. Can the mobile app send and receive data at the same time?
A. Yes
Q. Questions about Bluetooth pairing , can I pair with the system Bluetooth, what is the reason?
A. Dual-mode Bluetooth can pair with system Bluetooth, but single-mode Bluetooth can’t.
Q. What is the communication method with the MCU?
A. Usually via UART.
Q. What are the general parameters of PCB on-board antenna?
A. Impedance: 50Ω, Peak Gain: 3.0dBi.
Q. Is the external crystal of CC2540 module 32MHz?
A. CC2540 module has two crystals, one is 32MHz, another one is 32.768KHz.
Q. Commonly used Bluetooth test APPs, which ones support hexadecimal data?
A. Android: nRFconnect; iOS: nRFconnect, Lightblue.
Q. How do slave modules automatically reconnect with the master module?
A. Only the master can initiate the connection, so it is necessary to set up an automatic reconnection mechanism of the master, such as setting up an automatic reconnection mechanism in the mobile app or setting up an automatic reconnection mechanism in the MCU.
Q. How can a master module connect to multiple slave modules at the same time?
A. The master module to do polling communication mechanism, time-sharing communication, round-robin connection, that is, for example, A is the master, 123 are slaves, and then A and 1 connect, disconnect after communication. Do the same actions with 2 and 3.
IoT Gateway
Q. Can the mobile app send and receive data at the same time?
A. Yes
Q. Questions about Bluetooth pairing , can I pair with the system Bluetooth, what is the reason?
A. Dual-mode Bluetooth can pair with system Bluetooth, but single-mode Bluetooth can’t.
Q. What is the communication method with the MCU?
A. Usually via UART.
Q. What are the general parameters of PCB on-board antenna?
A. Impedance: 50Ω, Peak Gain: 3.0dBi.
Q. Is the external crystal of CC2540 module 32MHz?
A. CC2540 module has two crystals, one is 32MHz, another one is 32.768KHz.
Q. Commonly used Bluetooth test APPs, which ones support hexadecimal data?
A. Android: nRFconnect; iOS: nRFconnect, Lightblue.
Q. How do slave modules automatically reconnect with the master module?
A. Only the master can initiate the connection, so it is necessary to set up an automatic reconnection mechanism of the master, such as setting up an automatic reconnection mechanism in the mobile app or setting up an automatic reconnection mechanism in the MCU.
Q. How can a master module connect to multiple slave modules at the same time?
A. The master module to do polling communication mechanism, time-sharing communication, round-robin connection, that is, for example, A is the master, 123 are slaves, and then A and 1 connect, disconnect after communication. Do the same actions with 2 and 3.
IoT Module
Q. Can the mobile app send and receive data at the same time?
A. Yes
Q. Questions about Bluetooth pairing , can I pair with the system Bluetooth, what is the reason?
A. Dual-mode Bluetooth can pair with system Bluetooth, but single-mode Bluetooth can’t.
Q. What is the communication method with the MCU?
A. Usually via UART.
Q. What are the general parameters of PCB on-board antenna?
A. Impedance: 50Ω, Peak Gain: 3.0dBi.
Q. Is the external crystal of CC2540 module 32MHz?
A. CC2540 module has two crystals, one is 32MHz, another one is 32.768KHz.
Q. Commonly used Bluetooth test APPs, which ones support hexadecimal data?
A. Android: nRFconnect; iOS: nRFconnect, Lightblue.
Q. How do slave modules automatically reconnect with the master module?
A. Only the master can initiate the connection, so it is necessary to set up an automatic reconnection mechanism of the master, such as setting up an automatic reconnection mechanism in the mobile app or setting up an automatic reconnection mechanism in the MCU.
Q. How can a master module connect to multiple slave modules at the same time?
A. The master module to do polling communication mechanism, time-sharing communication, round-robin connection, that is, for example, A is the master, 123 are slaves, and then A and 1 connect, disconnect after communication. Do the same actions with 2 and 3.
Others
Q. Can the mobile app send and receive data at the same time?
A. Yes
Q. Questions about Bluetooth pairing , can I pair with the system Bluetooth, what is the reason?
A. Dual-mode Bluetooth can pair with system Bluetooth, but single-mode Bluetooth can’t.
Q. What is the communication method with the MCU?
A. Usually via UART.
Q. What are the general parameters of PCB on-board antenna?
A. Impedance: 50Ω, Peak Gain: 3.0dBi.
Q. Is the external crystal of CC2540 module 32MHz?
A. CC2540 module has two crystals, one is 32MHz, another one is 32.768KHz.
Q. Commonly used Bluetooth test APPs, which ones support hexadecimal data?
A. Android: nRFconnect; iOS: nRFconnect, Lightblue.
Q. How do slave modules automatically reconnect with the master module?
A. Only the master can initiate the connection, so it is necessary to set up an automatic reconnection mechanism of the master, such as setting up an automatic reconnection mechanism in the mobile app or setting up an automatic reconnection mechanism in the MCU.
Q. How can a master module connect to multiple slave modules at the same time?
A. The master module to do polling communication mechanism, time-sharing communication, round-robin connection, that is, for example, A is the master, 123 are slaves, and then A and 1 connect, disconnect after communication. Do the same actions with 2 and 3.