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C3MikroBUS/PlatformIO/ESP32C3CDC_QuickEspNowSync/lib/MessagePack/CHANGELOG.md

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+# Project change log
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+## [1.0.0] 2018-10-15
+Initial version

C3MikroBUS/PlatformIO/ESP32C3CDC_QuickEspNowSync/lib/MessagePack/LICENSE

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+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
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+other than an Application or a Combined Work as defined below.
+
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+Library.

C3MikroBUS/PlatformIO/ESP32C3CDC_QuickEspNowSync/lib/MessagePack/README.md

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+# MessagePack
+
+MessagePack is a library for AVR, SAMD, ESP8266 and ESP32 platforms to pack/unpack values into a compact, self-explanatory binary message.
+
+[![version](https://img.shields.io/badge/version-1.0.0-brightgreen.svg)](CHANGELOG.md)
+[![travis](https://travis-ci.org/xoseperez/messagepack.svg?branch=master)](https://travis-ci.org/xoseperez/messagepack)
+[![codacy](https://img.shields.io/codacy/grade/54c6bf3a367745509677e28dfbe1e0d1/master.svg)](https://www.codacy.com/app/xoseperez/messagepack/dashboard)
+[![license](https://img.shields.io/github/license/xoseperez/MessagePack.svg)](LICENSE)
+<br />
+[![donate](https://img.shields.io/badge/donate-PayPal-blue.svg)](https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=xose%2eperez%40gmail%2ecom&lc=US&no_note=0&currency_code=EUR&bn=PP%2dDonationsBF%3abtn_donate_LG%2egif%3aNonHostedGuest)
+[![twitter](https://img.shields.io/twitter/follow/xoseperez.svg?style=social)](https://twitter.com/intent/follow?screen_name=xoseperez)
+
+## Features
+
+The main features of the MessagePack library are:
+
+* Compact yet self-explanatory message format
+* Targeted to wireless communication
+* Support for boolean, short, integer, long, and float numbers and c-strings.
+
+## Usage
+
+Check the examples folder for working examples of the library.
+
+### Packing
+
+```
+
+#include "MessagePack.h"
+
+void send(unsigned char * data, unsigned char length) {
+    // ...
+}
+
+void setup() {
+
+    MessagePack * message = new MessagePack();
+
+    // Add some values, for instance temperature, humidity and pressure
+    message->addFloat(25.4);
+    message->addShort(67);
+    message->addFloat(1013.45);
+
+    // Send message
+    send(message->pack(), message->length());
+
+}
+
+loop() {}
+
+```
+
+### Unpacking
+
+```
+
+#include "MessagePack.h"
+
+void parse(unsigned char * data, unsigned char length) {
+
+    MessagePack * message = new MessagePack();
+
+    // Load the data
+    message->unpack(data, length);
+
+    // Number of elements
+    unsigned char count = message->count();
+    Serial.print("Number of values: ");
+    Serial.println(count);
+
+    // Walk elements (only for integer numbers, see example for full functionality)
+    char buffer[32];
+    for (unsigned char i=0; i<count; i++) {
+        unsigned char type = message->type(i);
+        if (MESSAGE_PACK_BOOLEAN == type) {
+            snprintf(buffer, sizeof(buffer), "Value #%d is a BOOLEAN: %d\n", i, message->getBoolean(i) ? 1 : 0);
+        } else if (MESSAGE_PACK_SHORT == type) {
+            snprintf(buffer, sizeof(buffer), "Value #%d is a SHORT: %u\n", i, message->getShort(i));
+        } else if (MESSAGE_PACK_INTEGER == type) {
+            snprintf(buffer, sizeof(buffer), "Value #%d is an INTEGER: %u\n", i, message->getInteger(i));
+        } else if (MESSAGE_PACK_LONG == type) {
+            snprintf(buffer, sizeof(buffer), "Value #%d is a LONG: %lu\n", i, message->getLong(i));
+        }
+        Serial.print(buffer);
+    }
+
+}
+
+setup() {}
+
+loop() {
+
+    if (Serial.available()) {
+
+        // ...
+
+        // send the message to the parser routine
+        parse(data, length);
+
+    }
+
+}
+
+```
+
+## Format
+
+This library works under the following assumptions:
+
+* Data is in little-endian format (least significant byte, is at the lowest address)
+* Integers have a length of 8, 16 or 32 bits (for SHORT, INTEGER and LONG types)
+* Floats are represented in IEEE 754 single-precision format, and have a length of 32 bits
+* Booleans are represented in a byte (1 = true, 0 = false)
+* Strings are ended by the NULL char (0x00)
+
+Data is binary packed with this format:
+
+* First byte: number of values packed in the string
+* N bytes with the information about the data type of each packed value. Each byte have information about 2 packed values, one for each nibble. Data types are coded in this way:
+    * 0b0000: Null
+    * 0b0001: Boolean
+    * 0b0010: Short
+    * 0b0011: Integer
+    * 0b0100: Long
+    * 0b0101: Float
+    * 0b0110: String
+* N bytes of data
+
+```
+The pack string (without spaces) for 17 (short), true (boolean), nil and 452 (integer) are:
+
+03 21 30 11 01 C401
+
+03 is the number of packed values, in this case 3
+21 is the type of the first and second packed values: short and boolean
+30 is the type of the third and fourth packed values: integer and null
+11 is integer 17 (0x11) in hexadecimal 1-byte integer (a.k.a. short)
+01 is boolean true
+C401 is integer 452 (0x01C4) in 2-bytes little-endian
+
+Total length is 7 bytes. Take note that the nil value is only present in the header and has not representation in the data.
+
+```
+
+## License
+
+Copyright (C) 2018 by Xose Pérez <xose dot perez at gmail dot com>
+
+The MessagePack library is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+The MessagePack library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the MessagePack library.  If not, see <http://www.gnu.org/licenses/>.

C3MikroBUS/PlatformIO/ESP32C3CDC_QuickEspNowSync/lib/MessagePack/examples/pack/pack.ino

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+/*
+
+MessagePack - Packing example
+
+Copyright (C) 2018 by Xose Pérez <[email protected]>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include "MessagePack.h"
+
+void setup() {
+
+    // Init serial communications
+    Serial.begin(115200);
+    while (!Serial);
+    Serial.println();
+    Serial.println("MessagePack Library - Packing example");
+    Serial.println();
+
+    // Create a message pack object, defaults to 100 bytes of memory
+    MessagePack * message = new MessagePack();
+
+    // Add some values, for instance temperature, humidity and pressure
+    message->addFloat(25.4);
+    message->addShort(67);
+    message->addFloat(1013.45);
+
+    // Now dump message to serial
+    char buffer[6];
+    Serial.print("Packed message: { ");
+    for (unsigned char i=0; i<message->length(); i++) {
+        if (i>0) Serial.print(", ");
+        snprintf(buffer, sizeof(buffer), "0x%02X", message->pack()[i]);
+        Serial.print(buffer);
+    }
+    Serial.println(" }");
+
+}
+
+void loop() {}

C3MikroBUS/PlatformIO/ESP32C3CDC_QuickEspNowSync/lib/MessagePack/examples/pack/platformio.ini

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+[platformio]
+src_dir = .
+lib_extra_dirs = ../..
+env_default = leonardo
+
+[env:leonardo]
+platform = atmelavr
+board = leonardo
+framework = arduino