Java. Script for Microcontrollers and Io. T Part 4 Espruino and the ESP8. In our last post from the Java. Script for Microcontrollers and Io. T series, we implemented a small web server using only Java. Script on top of the Jerry. Script interpreter and the Particle Photon. In this post, we will switch platforms Its time to introduce the popular ESP8. Espruino, a firmware with a Java. Script interpreter integrated in it. We will also be exploring how to use a serial fingerprint reader. Will Espruino plus the ESP8. Software Serial Esp8266 Sdk' title='Software Serial Esp8266 Sdk' />Java. Script on a microcontroller Lets find out Introduction. In our second post in this series, we succeeded in implementing a small script on top of the Particle Photon and Jerry. Script, a small Java. Script engine. In that post, we found out that we still had to do a lot of work in C to use Java. JPG' alt='Software Serial Esp8266 Sdk' title='Software Serial Esp8266 Sdk' />The above sketch uses 2 serials hardware serial to talk to a host PC and the serial monitor and AltSoftSerial to talk to the ESP8266 module. AltSoftSerial has the. The ESP8266 is the answer to I want something with Wifi. Surprisingly, there are a number of engineers and hobbyists who have not heard of this chip. A list of fixes and additions to the Visual Micro Arduino IDE plugin. Applies to Esp8266, Arduino, Intel and all other clones. Script for a small task. Of course, the idea was to do the C part only once and then rely only on Java. Script from then on. So, to really find out if it was worth it, we pressed on and in the third post we got our hands dirtier and implemented a web server using only Java. Script on top of what we had done for previous posts. The experience left us with a bitter taste It worked and ran OK, but we still had to work around limitations of the interpreter and to use a bit of C for the missing parts. Up to this point, we could only recommend going the Java. Script route for your microcontroller development tasks if you were willing to pay a considerable initial cost in developing all the C code necessary to get things running. For this post we decided to take a different route We picked Espruino, a microcontroller firmware with a strong emphasis on Java. Script. On Espruino the preferred business logic language is Java. Script A custom Java. Script interpreter is included with it, and all the APIs are already exposed through it out of the box. If things work as they should, we should find ourselves relying only on Java. Script code. Was that the caseFirst, lets take a brief look at Espruino and the ESP8. Our New Contenders. The ESP8. 26. 6The ESP8. Espressif Systems as a small Wi Fi module for bigger microcontrollers. It initially sported a serial interface that accepted Hayes commands to manage Wi Fi and TCP connections. Very little documentation was initially available in languages other than Chinese, but its low price, power, and flexibility quickly made it very popular. It was later established that the embedded microcontroller in the ESP8. Espressif and other manufacturers quickly developed bigger, more powerful variants. On the software side, many OSes designed for microcontrollers were quick to target the ESP8. Not only was Espressifs SDK available, but third party firmware too. The ESP8. 26. 6 remains cheap enough that getting one of the more powerful variants is usually the better option. In our case, we have decided to pick Node. MCUs ESP8. 26. 6 development kit. This kit includes the ESP 1. E variant of the ESP8. ESP8. 26. 6 for development. Of these, the most important is the voltage regulator which converts 5. V to 3. 3. V, allowing us to power the kit through USB or a cell phone charger, and the USB to SERIAL interface chip, which will allow us to easily interact with the ESP8. USB cable. Image courtesy of Wikipedia user Vowstar. This variant of the ESP8. Soft. AP mode access point modeSDIO SD card support. SPI2 UARTs Serial porti. PWM outputs. Analog digital converter. Mi. B of ROM1. 28. Ki. B of RAMEspressifs SDK is based on Free. RTOS and uses C as the main programming language. Fortunately, there are other options like Node. MCUs own firmware, which extends the original SDK with the use of Lua, a small scripting language well suited to embedded use. In our case, we are going to explore the use of Java. Script on the ESP8. Espruino. Espruino. Espruino is a firmware for microcontrollers with a strong emphasis on writing business logic in Java. Script. For this, it makes use of its homegrown Java. Script interpreter. Espruino exposes its whole API in its Java. Script environment and comes with a series of tools designed to make using and uploading Java. Script code very easy. Windows Xp Pro Sp3 Original Ibm Oem Full Iso. It even includes a REPL Espruino is also the name of several development boards that are specifically designed to work with this firmware. Fortunately, Espruino also works with other popular boards such as the ESP8. Espruino comes with its own IDE And its API is very simple and inspired on Node. It even supports TLS if you upload the right certificates WARNING upload the right CA certificates before trusting a connection. To see how to upload certificates, check here. And it even comes with pin mappings for Node. MCUs ESP8. 26. 6 out of the box WriteNode. MCU. D4, false Having so much functionality obviously comes at a cost Espruino uses a lot of memory, and its Java. Script interpreter is not an exception. We will talk more about this in the following section the example. The Example. For our example for this post, we will use Espruino on the ESP8. We will use only Java. Script to develop a library to communicate with it. We will also write code to open a smart lock which will be simulated using a LED in case certain conditions occur. We will also integrate this project with our sensor hub from previous posts. The sensor hub will send reports to our smart lock controller and will unlock the door in case a critical condition occurs like the flame sensor going off, or a gas leak is detected. In other words, this example will make us Use Java. Script to interact with a fingerprint scanner using a binary level protocol. Use Java. Script to read and write from the serial port. Use Java. Script to create a server that can listen for sensor events and parse them. Use Java. Script to operate GPIO pins to open and close the smart lock. Will the Espruino interpreter be up to the taskThe Fingerprint Scanner. For this example, we have picked one of the most popular fingerprint scanners the KOOKYE Fingerprint Scanner, based on Olimexs ZFM 2. This fingerprint scanner is cheap and quite powerful. It comes with its own microcontroller to process the fingerprints and match them against a database. It also comes with enough memory to store over 1. You can also upload and download fingerprints from it. It is perhaps too small for industrial purposes, but more than enough for ours. Step 1 Flashing Espruino. The Node. MCU ESP8. Fortunately, Espressif provides a simple command line tool to flash the ESP8. Lets install it. Make sure you have Python 2 or 3 installed. If not, follow the instructions for your platform. Make sure you have PIP installed Pythons package manager. If not, follow the instructions for your platform. Now use pip to install esptool pip install esptool. Connect your ESP8. USB cable. Now get the latest Espruino firmware. Extract the file to a directory of your choosing. Using your terminal, enter the espruino1v. Espruino firmware. Flash the firmware esptool. USB0 baud 1. 15. FC0. FE0. 00 blank. bin. Replace devtty. USB0 with the right port for your platform. If you are using Linux and you have no other Serial USB devices, the port should be devtty. Latex Template For Conference Program Templates. USB0. On Linux, you can check the output of dmesg right after connecting the board to see what port gets assigned to it. On Windows, you should use one of the COM ports for example COM1. You should see the ESP8. Step 2 Get The IDEEspruino uses a very simple IDE to interact with the development kit. It is distributed as a Chrome extension. ESP8. 26. 6. net The Internet of Things with ESP8. What is the Internet of things The Internet of things Io. T is the network of everyday objects. Basically, a little networked computer. Be it lightbulbs, toasters, refrigerators, flower pots, watches, fans, planes. This means computers will be permeating everything around. Internet. Because of low cost, networkable. Internet of things is really starting. What is ESP8. 26. The Chip. ESP8. 26. ESP8. 26. 6EX is a chip with which manufacturers are making. More specifically, ESP8. So. C with capabilities for 2. GHz Wi Fi 8. 02. WPAWPA2. GPIO, Inter Integrated Circuit IC. ADC, Serial Peripheral Interface SPI. IS interfaces with DMA sharing pins with GPIO, UART on dedicated pins. UART can be enabled on GPIO2, and pulse width modulation. PWM. The processor core, called L1. Espressif, is based on Tensilicas. Diamond Standard 1. Micro 3. 2 bit processor controller core and runs at 8. MHz. or overclocked to 1. MHz. It has a 6. KB boot ROM, 6. KB instruction RAM. KB data RAM. External flash memory can be accessed through SPI. The Modules. Vendors have consequently created a multitude of compact printed circuit board. ESP8. 26. 6 chip. Some of these modules have specific. ESP WROOM 0. 2 and and ESP 0. ESP 1. 4 while other modules might be ill labeled and merely referred to by a. ESP8. 26. 6 Wireless Transceiver. ESP8. Io. T developments. Espressifs official. ESP WROOM 0. 2 and ESP WROOM S2. The Ai Thinker modules. ESP 0. 1 through ESP 1. Note many people refer to the. Ai Thinker modules with the unofficial monikers of ESP8. ESP8. 26. 6 1. 4 for clarity. See the. ESP8. 26. Wikipedia. ESP8. 26. The Development BoardsModules. ESP8. 26. 6 based development boardsmodules often incorporate a surface mount PCB. USB to serial bridge, and breakout to 0. For example, the Node. MCU Development Kits use Ai Thinker modules, and the. Adafruit Feather HUZZAH. Ai Thinker ESP 1. S module and a Si. Labs CP2. 10. 4 USB to serial bridge chip. Where can I get it Disclaimer Vendors are listed for informational purposes only. Buyers should use prudence and careful judgement when ordering. Before ordering, read all product descriptions and check vendor ratings when possible. Prices listed below are approximate and do not include shipping costs. Furthermore, prices listed below may be outdated, so be diligent and check for yourself. Where can I learn more about it Forums Chat. Readings. Software Platforms, Firmwares Frameworks. Espressif AT firmware. Espressif Free. RTOS firmware. ESP8. 26. 6 core for Arduino. Sming. Open source framework for high efficiency native ESP8. Embedded programming platform. ESP Open SDK. Free and open as much as possible integrated SDK for ESP8. ESP8. 28. 5 chips. ESP Open RTOS. Open source Free. RTOS based ESP8. Java. Script. Visual programming. A visual programming environment using Google. Blockly designed for the ESP8. Node. MCU using the. Lua Node. MCU firmware. A commercial visual programming environment. Networking. USB ESPUSB. Software only ESP8. USB device. forum. Spacial. ESPWeb. Framework. A Web framework for ESP8. Frankenstein. Alternative firmware for ESP8. See also Electrodragon wiki ESP8. ESP8. 26. 6 community wiki loading firmware.