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Can recommend the mcu for wireless emergency stop device?

lee Peng
Intellectual 720 points
Other Parts Discussed in Thread: CC2640, CC2640R2F

I am now selecting mcu for the wireless emergency stop system.  The receiver will installed on the robot while the emergency device will hold by the worker. Once the worker active the emergency button, the emergency signal will be transmitted to the receiver.

On the robot side, the mcu processes the signal and then trigger the emergency stop of the robot ，there are some requirements:

1. usually the emergency stop is controlled by a relay while the mcu can not drive the relay directly due to the low output current. However,  the mcu should have the ability to drive the relay by some medium device.

2. The mcu can communicate with the plc so that it can send emergency stop signal to the plc.

In terms of communication, WIFI and Bluetooth are the candidates. 

The connectivity must be reliable and fast respond.

Is there any recommended mcu that meets the requirement from TI?

  • 0
    TI__Mastermind 41705 points

    Li,

    If you'd like to use Wi-Fi, I recommend the CC3220 (2.4GHz Wi-Fi solution) or CC3235 (2.4GHz and 5GHz dual-band Wi-Fi solution).

    For Bluetooth, I recommend the CC2640 (Bluetooth low energy (4.2) stack) or CC2642 (Supports Bluetooth 5).

    I suggest you read through their datasheets to see if their specs meet your specific electrical/timing requirements.

    BR,

    Seong

  • 0 in reply to Seong Kim
    Intellectual 720 points

    Thank you.  Does ti provide a reference design for the antenna and its transmitting path(like the parameter of the components on the path) of each MCU?  For example, if I use the cc2640, the antenna is necessary. My application need small size ( like a smart watch), in which a PCB antenna may be the best choice, however, I do not have the equipment and experience for designing or tunning the antenna.  If using the commercial antenna, a transmitting path needs to be carefully designed (impedance matching).   

  • 0 in reply to lee Peng
    TI__Guru**** 317180 points

    With CC2640, please read as CC2640R2F.

    For a watch, you should also look into chip antennas since a PCN antenna will require some area. Or you can place the antenna as part of the watch casing.