Map.Entry map = (Map.Entry)iterator.next() We cannot use TreeMap to sort values because TreeMap sorts elements by Keys. There is a slight difference between sorting HashMap by Keys and Values is that it can have duplicate values but not duplicate Keys. We get a HashMap whose values are in sorted order.
Since LinkedHashMap guarantees the insertion order of mappings. Now create a new LinkedHashMap and copy the sorted elements into that. Use the Collections.sort(List) method to sort the list of elements by values by passing customized comparator. It compares two elements based on the values.Īfter that get the Set of elements from the Map and convert Set into the List. To sort the HashMap by values, we need to create a Comparator. In Java, sorting HashMap by values is complicated because there is no direct method is available. Print 'USBclient.Sort HashMap by Values using Comparator Interface Judging from this: you should be looking at dataReceived(self.) method of your Protocol subclass
Thanks in advance, any help is appreciated! 9 years, 7 months ago 1) Solution SerialPort(USBclient(), '/dev/ttyACM0', reactor, baudrate='115200')Īs you can see the code is just looking for anything on the serial port but I can't seem to make that magic happen. Print 'data from arduino is at the serial port!'ĭef render_GET(self, request): #passes the data from the get request Print 'Arduino device: ', serServ, ' is connected.'ĭef serialReadEvent(self): #maybe it should be: doRead()? Couldn't get either to work. Anyway here is what I have so far: import sysįrom import Factory, Protocolįrom import SerialPort I just cannot seem to find a good example for Twisted Python online to receive serial data or at least an example that I understand. :/ I have been working on this for a bit over a month and seem to be stuck. I cannot seem to get this code to listen to that same serial port though. The code below runs on the RPi, receives a GET request and passes some of that data through the serial port to the Arduino. I verified that the Arduino is sending chars every 2 seconds with a serial monitor application in the Arduino programmer running on the RPi. However I cannot seem to generate Twisted code which will detect anything coming from the Arduino to the RPi on the serial port. So far I am able to send from the Raspberry Pi to the Arduino and effectively turn its LED off/on just as expected. I am trying to keep it simple for now and just trying to send a char at any one time between the two devices. I have been working on an Arduino/Raspberry Pi project where I have found myself learning not just Python but Twisted Python as well so I apologize in advance for my newbness. Top Twisted Python script on Raspberry Pi (Debian) to communicate with Arduino via USB Twisted Python script on Raspberry Pi (Debian) to communicate with Arduino via USB
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