A kind of udp network protocol realizes the device and method of displaying electrocardiogram in browser

Abstract

The invention discloses a device and a method for realizing electrocardiogram display of a browser by a UDP (User Datagram Protocol) network protocol, and the device comprises an electrocardiogram sampling data sending device consisting of a NODEMCU (Non-Oriented Digital Enhanced Microprogrammed Control Unit) module, an AD623 instrumentation amplifier and an anti-interference electrocardiogram amplification circuit realized by a broadband pass filter consisting of two stages of 358 operational amplifiers. The NODEMCU module is wirelessly connected with a mobile phone or a computer through a built-in WIFI network, and a NodeJS UDP-to-WS protocol is configured on the mobile phone or the computer, so that the single-chip microcomputer can display a transverse wide dynamic electrocardiogram onthe mobile phone or the computer through UDP protocol network communication. Implementation of an HTML5-JS program at a browser end is a mainstream front-end technology, so that the programming environment requirement is reduced to the minimum, and the invention is particularly suitable for popularization and open sources. The mode has the greater significance that data processing and storage management are put on a mobile phone or a computer with stronger processing capacity and ultra-large storage capacity, so that the combination of the WIFI single chip microcomputer and the mobile phone or the computer makes the best of each other, and a new WIFI single chip microcomputer application mode is provided.

Description

technical field [0001] The invention belongs to the field of computer communication control, and in particular relates to a device and a method for realizing a browser displaying an electrocardiogram through a UDP network protocol. Background technique [0002] NODEMCU (or ESP-XX series, ESP8266 core, more than ten yuan, big thumb) WIFI single-chip microcomputer module is the cheapest and excellent core component at present, which is of great significance. Especially with NODEMCU LUA firmware, the programming adopts LUA script language, the program development is simple, there is no need to build too many development environments, just a notepad (of course, it is better to have HBuilder and NodeJS on the mobile phone), and the program explanation is in the NODEMCU firmware . However, NODEMCU is often criticized as only capable of simple character information transmission, or simple digital logic state control. It will be very practical if NODEMCU can be used to sample ECG ...

AI Technical Summary

Problems solved by technology

[0003] The unreliable UDP network transmission protocol is used in the WIFI LAN for high-speed transmission. Because the LAN does not have too much interference, it is practical to find that no data will be lost, and its high speed solves the bottleneck problem for the cheap WIFI single-chip microcomputer module, but It also appeared that the UDP protocol cannot communicate with the most popular browsers

[0004] In the existing technology, if you want NODEMCU to directly connect to the mobile phone browser through WIFI, NODEMCU is typically used as WEB service, and the sampling data is continuously pushed to the browser through SSE mode. Values ​​in the range of 0-255 bytes can be transmitted, and must be transcoded by BASE64 (in fact, not only SSE, but also the MQTT Internet of Things protocol, which is hailed as the most resource-saving Internet of Things protocol, also requires BASE64 transcoding, which brings opportunities for single-chip devices with limited speed. Big problem); 2. Due to the new security rules for network same-domain access, the browser is not allowed to start the WEB service of cross-domain access to NODEMCU locally, so the H5-JS program and data must be placed on the WIFI MCU NODEMCU with extremely limited resources. very unreasonable

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