支援32GB SD Card, 可調整觸發距離, 可連網之危害告知器 - v2

***此說明中所用的危害告知器為v2版本***

Revision History: 
- v1 @ 2020/3/24: 第一版


功能說明:

本裝置透過超音波偵測環境中之物體, 當物體與本裝置間之距離小於預設值時將觸發本裝置之告警功能. 本裝置之觸發距離可以30公分為單位進行調整, 最遠可達300公分.

本裝置被觸發時可透過下列方式發出警報:

1. 透過內建 / 外接喇叭播放預先存放在SD Card (註1) 中之音聲訊息;
2. 透過外接之警示燈 (透過乾接點) 提供視覺訊息.
3. 透過網際網路對個人或群組發出E-Mail / Telegram等圖文訊息 (註2).

與使用紅外線感應之裝置相比, 由於超音波具有防強光 (太陽), 指向性, 波束窄, 及可測量與物體間距離之特性, 因此, 本裝置將可比使用紅外線感應之裝置更有效的防止誤動作之發生.

註1: 本裝置支持最大容量為32GB之Micro SD Card, 您需事先錄製欲播放之語音並將其存放在SD Card上後插入本裝置中. 若您需要能夠於現場立即錄音, 立即播放的版本, 請點擊下方網址.
https://wei48221.blogspot.com/2019/07/40.html

註2: 需有網際網路連線並向本公司換購相對應之軟體.

ESP32 - Compact breakout board for low power applications

This is a compact ESP32 breakout board for low power applications. To ensure minimum power consumption, aside from the ESP32-S module itself, all the other components that consume power have been removed.

This breakout board was developed for prototyping on PCB or a perf board. Instead of soldering the ESP32-S module to the PCB / perf board directly, this breakout board allows for the reuse of the ESP32-S module without the need to de-solder it.

ESP32 - Breadboard friendly breakout board for low power applications

This is an ESP32-S breakout board for low power applications. To minimize power consumption, all the components (LDO, LED, USB - Serial Chip, etc.) that consume power have been removed. The difference between this breakout board and the common NodeMCU-32S can be seen in the photo below (Left: Low Power Breakout Board, Right: NodeMCU-32S).

無線門窗開啟警報器

此裝置可被安裝於門, 窗, 抽屜, 儲物櫃, 冰箱, 酒櫃等處並於其被開啟時經由E-Mail及短訊等方式提供無聲警報.

產品介紹

支援32GB SD Card, 可調整觸發距離, 可連網之安全告警裝置 - v1

***此說明中所用的機器為v1版本***

本裝置透過超音波偵測環境中之物體, 當物體與本裝置間之距離小於預設值時將觸發本裝置之告警功能. 本裝置之觸發距離可以30公分為單位進行調整, 最遠可達300公分.

本裝置被觸發時可透過下列方式發出警報:

1. 預先存放在SD Card中之語音 ;
2. 警示燈 (透過乾接點);
3. E-Mail*;
4. 即時訊息 (Telegram)*.

註: 發送E-Mail及即時訊息之功能需搭配網際網路使用.

與使用紅外線感應之裝置相比, 由於超音波具有指向性, 波束窄, 及可測量與物體間距離之特性, 因此, 使用超音波之本裝置可更有效的防止誤動作之發生.

註:
本裝置支持最大容量為32GB之Micro SD Card, 您需事先錄製欲播放之語音並將其存放在SD Card上後插入本裝置中. 若您需要能夠錄音的版本, 請點擊下方網址.

https://wei48221.blogspot.com/2019/07/40.html

可錄放40秒語音, 可調整觸發距離, 可連網之安全告警裝置

本裝置透過超音波偵測環境中之物體, 當物體與本裝置間之距離小於預設值時將觸發本裝置之告警功能. 本裝置之觸發距離可以30公分為單位進行調整, 最遠可達300公分.

本裝置被觸發時可透過下列方式發出警報:

1. 預錄語音 (最長40秒);
2. 警示燈 (透過乾接點);
3. E-Mail*;
4. 即時訊息 (Telegram)*.

註: 發送E-Mail及即時訊息之功能需搭配網際網路使用.

與使用紅外線感應之裝置相比, 由於超音波具有指向性, 波束窄, 及可測量與物體間距離之特性, 因此, 使用超音波之本裝置可更有效的防止誤動作之發生.

註:
本裝置支持即時錄音 (最長40秒) 功能, 錄下之語音儲存在非揮發性記憶體中, 不因斷電而消失. 若您需要更長之語音播放時間, 請選用使用SD卡之版本 (請點擊下方網址).

https://wei48221.blogspot.com/2019/07/32gb-sd-card.html

冷氣中央監視系統介紹 (This post is in Chinese)

底下是一套可以集中監視冷氣運作狀態的系統之介紹. 此系統可幫助使用者在無需更動現有冷氣管線的情況下透過手機 / 平板 / 電腦等裝置監視冷氣機之運作狀況以利使用者適時的作出關機, 調高溫度等處置以達到節約能源的效果.

系統架構

Internet connected ultrasonic alarm device with adjustable trigger range and SD Card support

This is a quick overview of a device that gives audio and visual alarm when it's triggered. The sensor used for object detection is an ultrasonic sensor with a triggering range from 1cm to 300cm and a beam angle of 30 degree from the point of origin. This triggering range is adjustable at 30cm interval via a dial in the front of the device and the set triggering range is visible via the 10 segments LED on top of the device.

The combination of narrower beam angle and adjustable triggering range makes this device an ideal candidate for applications that need to minimize false alarm.

Note,

This device uses SD Card (storage capacity up to 32GB) as its storage. The audio to be playback needs to be pre-recorded and stored in the SD Card. If you need to be able to record new audio on the spot and the audio is less than 40 seconds, please refer to the link below.

https://wei48221.blogspot.com/2019/06/internet-connected-ultrasonic-alarm.html.

Internet connected ultrasonic alarm device with adjustable trigger range and 40 seconds of audio record / playback time

This is a quick overview of a device that gives audio and visual alarm when it's triggered. The sensor used for object detection is an ultrasonic sensor with a triggering range from 1cm to 300cm and a beam angle of 30 degree from the point of origin. This triggering range is adjustable at 30cm interval via a dial in the front of the device and the set triggering range is visible via the 10 segments LED on top of the device.

The combination of narrower beam angle and adjustable triggering range makes this device an ideal candidate for applications that need to minimize false alarm.

Note,

This device allows instant recording of new audio (up to 40 seconds) and the recorded audio is stored in flash memory for playback. If you want longer playback time, please refer to the link below for a similar device that uses SD Card as its storage.

https://wei48221.blogspot.com/2019/06/internet-connected-ultrasonic-alarm_6.html.

Wireless Door / Window Sensor

This is a wireless door / window sensor device that sends you email / instant message notification when your door / window is open.

A solution for monitoring multiple air conditioning systems

This is a quick overview of a system that I developed to monitor the status of multiple air conditioning system (A/C) for a friend's company.

Background 

The friend's company has a 2-story building with over 20 rooms. Each room has at least one A/C installed. The A/Cs are controlled by the controller installed in the individual room and they cannot be centrally controlled / monitored. From time to time, the A/C will be left turned on for long period of time (over the weekend, etc.) until someone finds out about it and turn it off.

Due to safety concern, my friend doesn't want me to mess with the wiring of the A/C. He also doesn't want me to install additional powerline and power outlet around the A/C to provide power to the sensor used to monitor the A/C.

Solution For Control & Monitor Equipment In Outdoor Enclosures

Here is a solution developed for a client with thousands of outdoor equipment enclosures.

The client’s needs:

• Remotely monitor and regulate the temperature inside each enclosure;
• Remotely switch on / off individual equipment in the enclosure;
• Protect circuit breaker from continuous tripping;
• Able to reset the tripped breaker remotely;
• Remotely monitor the status of the backup battery;
• Provide comprehensive overview at a central location;
• Provide field work groups with an overview of the enclosure status in their respective working area;
• Send notice to the responsible work group upon the occurrence of an event that requires the group’s attention / intervention.

Below is a quick overview of the solution developed for the client.

Accessories for fan controller

Below are the accessories for the fan controller mentioned here.

Power Supply

DC12V, 5A Power Supply - US$7.99/ea.

Fan controller that enables control and monitoring of DC12V ~ DC48V 4-wire PWM fan over LAN / WAN

This fan controller could control and monitor the speed of 4-wire PWM fan that runs on DC12V to DC48V power supply. The fan speed could be controlled manually by user via a web interface or automatically according to user-define temperature - fan speed settings.

ESP8266 WiFi Repeater Kit

I developed a WiFi Repeater kit that could be used to extend network coverage into areas with poor or no coverage.

IOT Fish Tank

For the past couple of months I've been working on a project that allows me to monitor fish tank and feed the fishes.

The things that I want to do are the followings:

- Feed fishes automatically based on preset schedule or manually by pressing a button on the controller;

- Measure water temperature and water level;

- Measure the ambient light, temperature and humidity;

- Check on the fishes remotely;

- Be able to switch on / off peripherals such as lamp / pump / heater / etc. remotely.

After months of trials and errors and several revision of hardware and software, I am happy to present the result below.

RJ-11 as physical I/O interface

For board with multiple I/O ports and each port has multiple wires, I find it quite convenient to use RJ-11 as the physical I/O interface because it could be plugged / unplugged very quickly and it supports up to 6 wires in one port.

ESP-12F Programming Jig and Breadboard Adapter

I recently developed a programming jig and breadboard adapter for ESP-12F.

The Programming Jig

The programming jig (center right) and CP2102 (center left).

ESP-01 Programming Jig and Breadboard Adapter

I am tired of using breadboard for burning code to ESP-01 so I developed a programming jig.

A remote controlled AC power switch with visual monitoring capability

As a 3D printing and electronics hobbyist, I recently developed a device to help me remotely monitor my print and cut off power to my printer in case it starts making spaghetti.

Different Flavors of 3D Printed Spaghetti

Spaghetti Making Videos:
https://youtu.be/YS6gH66_7yE
https://youtu.be/87gsL-Luvis