Hi Everyone, I propose having a Serial.end() method. Reasoning: Pins 0 and 1 can be used for either digital i/o or serial communication. Simodrive 6sc6101 pdf. Softcam key download. The docs say that once Serial.begin() is called, you can no longer use these pins for digital i/o. With the addition of Serial.end(), this will no longer be the case and the docs could say 'Once Serial.begin() is called, do not use pins 0 or 1 for digital i/o unless you first call Serial.end().' I think this fits squarely in the core Serial library as it adds symmetry (undoing effects of Serial.begin()). I spent a couple of minutes implemented Serial.end() in Arduino 12 this morning. The main change is the addition of the following function in wiring_serial.c. Well pin 1 is hardwired through a 1k series resistor to the USB serial convertor chip so it will act like a pull-up if the USB is ouputting a steady high and might act like a voltage divider depending on what you wire to pin 1. Pin 0 is also hardwired to the USB serial chip as an input so probably not as much an issue, but might try and send serial data to the PC if the pin 0 is inputting data from an external source. It might be ok, but needs to be looked at to see if using pin 1 and 0 as a input or output with external components, what the effect of the USB serial connect might have on it. A simple to use serial communication software for communicating with other serial, MCU and Arduino. The SoftIB Serial Communicator communicates with other Serial devices that use a simple asynchronous communication using only the RX and TX signals without any control signals. 'I propose having a Serial.end() method.' This would be a welcome feature from my point of view. Is it true however that both pins (TX/RX) then will be fully functional? I see from the Duemillanove reference schematic that the FTDI chip is hardwired to Tx/Rx and I assume then that the Rx line will be pulled low as opposed to floating even though USB may be disconnected, but I'm more that happy to be corrected on this assumption. To take this a step further, could the SerialEnd function be expanded to free up either Tx or Rx if the serial interface is used only for one-way communication (send or receive, but not both)? If USB is connected, but only used partial (send or receive only) or not at all - will it still be possible to use one or both of Rx/Tx for general purpose IO? A destructor isn't a good idea, because the Serial objects are created in a separate object file and the call to re-create them has to be made from within HardwareSerial.cpp because of local variables. It's probably best to just add a end() to the HardwareSerial class and beef-up the begin() to be more error resistant. I've been using a different Serial.begin() which fully sets up the serial port. The Arduino library leaves most of the previous settings intact and trusts that they were sane(which just bit those 8Mhz people with the U2X bit). Blackstone ultrasonics manual. Super-concentrated 4 in 1 is used at half. (formerly Moog Components Group) Moog Components Groups' LifeGuard ultrasonic air bubble detectors feature proprietary swept frequency technology, making these sensors more reliable and accurate than those utilizing fixed frequency or pulse-type circuitry.
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