All people start businesses and innovate.

Great ideas have been implemented and put into practice, and various practical products have emerged. Thanks to technology, these good and creative products have entered our ordinary life In our hands, let us feel that technology has changed our lives invisibly.

I am a product developer who works hard. I go out early and come home late every day. I am really worried about the elderly and children at home. I have tried all kinds of ways. At the beginning, when there was no intelligent camera, I used The router is connected to a USB camera as a monitoring device. As you know, it can only log in to the web page to view static pictures. The effect is poor; Later, the intelligent surveillance camera with PTZ came out, and it was finally possible to watch real-time dynamic video. The large factory could not afford to spend thousands of yuan. The video and audio connection software developed by the small factory was really not flattering, and often stuck and could not be connected.

I want to have many students like me It is a good choice for us to use the existing idle mobile phones to intelligently realize the function of real-time voice and video chat between the elderly and children. It also has the functions of PTZ, one button call, etc. It is simple to operate and cheap. Personally, I feel that this product has a good positioning and entry point, which has targeted the market vacancy and solved a large number of problems Psychological pain points.

Before that, I briefly talked about my basic needs for home care products:

1. Real time voice and video

2. Users safety protection

3. One click for help

4. Uninterruptible power supply

 Real time voice and video

There is nothing to say about this. Basically, all these home care products have functions.

Most of them are connected to home WIFI through host devices , and then through the customized APP, the remote client device can be connected to the home host device. The premise is that both the host end and the remote mobile phone end need to log in to the APP to be connected. On the contrary, if one end is not logged in, it will be completely off. It is believed that the alert students have already found out where the disadvantages of this design lie. For the time being, it is not easy to simply realize the real-time online of client APP and host APP, without mentioning the power failure, router failure, and network jam. The host side is a special device that is not used for other purposes, and there is a power adapter that can be charged all the time. The APP will not have any impact if it is always turned on, regardless of the time. Mobile phone? How to ensure that users' remote mobile terminals can be online in real time? After the mobile phone is installed with the client APP, the APP needs to be always open or in standby mode to receive calls from the host in real time. In order not to be killed by the Android system optimization software, some manufacturers' basic routine is to ask the mobile phone system for various permissions when installing the APP, It's hard to completely shut down the APP after it is started or it can't be shut down at all, which means that you think it has exited. In fact, it is still running in the background and resident in the process, resulting in problems such as system jam and short endurance. My personal feeling is that it is a bit of rogue software.

Personally, I prefer to kill the process after using it. Don't ask me why, Right. Of course, some students may applaud the resident process behavior of APP, calling it "the little strong that can't fight to death", because it can keep the remote call unblocked, and individuals get what they need.

Fortunately, the hardware configuration of mobile phones is developing at a rapid speed. Isn't there already a mobile phone configuration that has broken the 6G RAM barrier? As for power consumption, it has its own power bank.

Personally, I think that a good product is acceptable without the need for users to make choices and judgments. In view of the current development of Internet telephony, and With the progress of soft SIM technology, it is not impossible for the objects of remote voice and video calls to move closer to the mobile communication network. Of course, there will be some communication costs and some technical problems to overcome. At least, users will have one more choice, and will not worry about home host SOS calls, while the remote mobile phone is not online.

 User privacy security protection

In the era of the Internet, the Internet has brought us a lot of convenience, but also created many hidden dangers, such as Internet fraud, privacy leakage, etc.

While we are watching everything in the home with family nursing equipment, it is not good if there is another pair of eyes behind us peeping...

Family was also reported earlier The hidden danger brought by the industry. After hackers invade the monitoring system, users' privacy is leaked, exposing the development weakness of network monitoring. How to overcome the hidden danger and ensure users' privacy security has become New problems facing development.

Personally, I think that home care equipment and remote monitoring equipment face the same problem. Appropriate home care equipment must provide a safe user privacy protection system. Most home care devices rely on host devices to connect to the home WIFI network to achieve the purpose of online voice and video. Theoretically, as long as you are connected to the Internet, you can transmit data. You can watch the situation at home through the host camera. Hackers can also peek at the situation at home through the online camera, even using the camera as a springboard, And then control the home router and even the whole home network and office network, resulting in more serious consequences.

Let's briefly analyze whether it is alarmist.

For example, Xiang Jiabao, the host side uses the user's idle mobile phone and tablet, but not customized ROMs. It is uncertain whether the user's mobile phone and tablet system version is the official ROM, whether there are loopholes, and whether there are some third-party software with a back door installed. Don't think that only malicious groups or individuals will release these apps with a back door It is not also exposed that the APP background mobile phone obtains users Data? Don't think that these things are far away from you. In fact, they are around us every day. Fortunately, we are grass roots. Collecting information about us has no effective value. Let's talk about home routers. Some users are careless. Not changing their passwords or using simple passwords to log in is likely to cause unsafe risks. Some are loopholes in the routing equipment itself. Technicians say that some routing manufacturers have their own backdoors, or there are some defects in their firmware. Hackers can directly use these loopholes to control home routers. Therefore, this part requires users to pay more attention to their own convenience, that is, to make it convenient for others.

Another is the security level of the background data of the company. The company will prompt you to enter a password when registering and pairing its host app and mobile app, which is relatively safe.

 One click for help

Since it is a home care device, I think it is necessary to call for help with one button. The objects of home care are the elderly and children. In case of emergency, messages need to be sent out easily and quickly. For some devices, the call for help with one button is to dial the internal ID number of the APP rather than the mobile phone number. As mentioned above, if the remote mobile phone APP is not opened or running, The call will not succeed.

 Uninterruptible power supply

Personally, I think that the home care product is a real-time standby device, which is charged 24 hours a day. It needs to consider the situation of short power failure and sudden power failure of the device. The first consideration is the built-in battery. According to the current internal space of Xiang Jiabao, there is a place to place the battery, 18650 battery cells can be placed, and soft battery can also be placed. The second power interface can consider the connection with mobile phones The universal mUSB interface of the tablet is powered by 5V, so that devices such as power bank can be used as backup power, greatly improving the installation position and use scenario of the product.

Next, I would like to experience Xiangjiabao with you to see if this smart home care product is satisfactory, and let more students have the opportunity to understand this product, providing valuable reference for their purchase. At the same time, I hope that the problems of the product can be fed back to the manufacturer in time to better improve this product.

Xiangjiabao Shanghai Qingmang Science and Technology Development is similar to Dingdong Home and Xiaoyu Home intelligent nursing equipment. Through Xiangjiabao, children can easily video chat with their parents, remotely view their family status, and achieve the purpose of remote nursing. Unlike the former product, Jiabao does not have a display screen, Instead, the old mobile phones and tablets of users' mobile phones are used as computing platforms and display carriers for the second time, which not only reduces the cost of their own hardware, but also reuses resources.

Parameter introduction:

Personally, I think the most powerful thing about wanting a family heirloom is that it rotates 360 degrees horizontally and 35 degrees vertically.

Unpacking, it was damaged again. Can you pack it well?

Fortunately, there is no damage inside.

Charging line of host terminal equipment.

Want to Jiabao equipment charger.

Output 12V 1A.

The silk shirt gradually faded.

The true face of Mount Lushan.

The upper layering can be pulled up to fit larger mobile phones and tablets.

After lifting, it is necessary to tighten the compass to lock the upper strip.

Mobile phone, tablet charger, 5V 0.75A output, SONY XPERIA PAD cannot be charged normally.

4.3 inch mobile phone on shelf effect.

The effect of 6-inch mobile phone on the shelves.

USB charging interface can monitor the power of mobile phone in real time, and automatically charge when the power is less than 70%.

The bottom details are stable thanks to 4 anti slip foot pads.

Large call key and indicator light.

Just long press this button to initiate a video dialogue to the default user.

For initial registration, the mobile phone number is required to be bound, and the security is relatively good.

Accidental login failure, unable to connect to the corresponding device.

When the above situation occurs, the host mobile phone also cannot search for the host of the family heirloom.

The base is equipped with an infrared sensing module. If no one is near for a long time, the screen at the base end will be turned off automatically, and it will be turned on automatically when someone is near to save power.

Rotate up and down with a maximum angle of 35 degrees.

Based on this, you only need to slide the phone up, down, left and right to adjust the angle of Home Treasure. The situation at home is at a glance, which is a very good design.

The client APP sets the problem push information, which can be sent to the host regularly.

The host end screen displays corresponding text messages.

If there is no response within 5 seconds, the base end will be automatically connected This system will become a webcam that can be connected at any time to monitor the situation at home.

Buckle off the 4 anti slip floor mats at the bottom.

Remove 4 screws.

You can see the internal conditions. The bottom uses the guide rail technology to place key components on the guide rail, and power the guide rail to achieve 360 degree free rotation.

The upper structure uses the lever principle and the motor to drive the whole screen to rotate up and down.

Split mold opening, assembled by 6 screws, can save a lot of money in cost.

Main control PCB, 360 degree rotating motor on the left.

PCB screen printing: QMUB REV1， Plate making 2015.4.10.

Indicator light, 4 blue Lights.

The white part is a body sensing lamp, which is actually infrared , it can automatically open the screen when someone approaches, and automatically close the screen when leaving.

The switch button is covered under the white plastic sheet, which is the huge call button on the shell.

It is speculated that the problem is poor touch, so a layer of gasket is added, and transparent plastic tape is used around it to prevent liquid flowing from the key gap and causing PCB short circuit.

Bottom motor drive interface, 5 wires, guess 4 phases and 5 wires 。

Stepping motor is not a black technology, but it can not be used like ordinary DC motor and AC motor under normal conditions. It must be made of double ring The control system composed of power drive circuit can work normally. Therefore, simple selection and flexible control of stepper motor are the difficulties. It involves mechanical, motor, electronic and computer expertise.

The speed and stop position of the motor depend on the frequency and number of pulses of the pulse signal The motor turns over a step angle. The existence of this linear relationship makes it easier to use the stepping motor in the control of PTZ.

from It can be seen from the silk screen that the power supply voltage of the motor is 12V, and the 12V power adapter is configured for Xiangjiabao.

The inconvenience of 12V power supply mentioned above is that it can't be used in the same way as the general mobile phone and tablet power supply. The most important thing is that if the power trip or power failure occurs, the charging bank can't power on Xiang Jiabao. No matter how good the product is, it can only be stopped. Students with strong hands-on ability can consider bringing their own car batteries...

The chips in the red box are:

48pin chip is STM32F101CB, ; 18pin chip is ULN2803AG, Darlington tube driver chip.

As can be seen from the picture, the microprocessor model used by Xiang Jiabao is STM32F101CB, and the manufacturer is Italian French ， ST is the world's leading manufacturer.

STM32F101CB uses ARM ® Cortex of ™- M3 core and embedded (128K) and （16K） ， It is a 32-bit microcontroller with 6 16 bit timers ADC 、 The STM32F101CB has 7 communication interfaces. Because the STM32F101CB has built-in ARM core, it is compatible with current ARM tools and software.

Benefited from Built in up to 16K bytes ， It can be accessed (read/write) with a 0 wait period. The system responds very quickly in actual operation.

According to the official DATASHEET, the STM32F101CB basic model supports three types Mode, which can be set in the , short startup time and various wake-up events to achieve the best balance, which also indirectly lays the foundation for the built-in battery life and power saving.

The connection between ULN2803AG drive chip and stepping motor can be simplified as shown in the following figure:

5. 6pin is 12V driving voltage, P0.0 (A), P0.1 (B), P0.2 (C), and P0.3 (C) are respectively the driving ports of 1, 2, 3, and 4pin 4 phases. Different values can be assigned to the ports through assembly language or C, and the stepping motor can rotate according to the port values.

Changing the pulse sequence can easily change the direction of rotation.

For example, if the stepping angle of the stepping motor is 30 degrees, that is, one pulse rotates 30 degrees, and one revolution is 360 degrees, 12 pulses are needed to complete it.

With so much wordiness, there is no logic to speak of. It is basically about where you want to write. I hope it can help you understand more about this product.

In general, Xiangjiabao stands out among many smart home care products, which is enough to show that it is a thoughtful product. Based on the attitude of being responsible to students and manufacturers I hope you can identify the advantages and disadvantages of.

Advantages:

1. 360 ° seamless rotation, up and down adjustable 35 ° rotation; fucking great.

2. Use of idle mobile phones and tablets;

3. Simple operation;

Insufficient:

1. It is hoped that the host can call the mobile phone number with one button;

2. It is hoped that the power interface can be unified;

3. There is no highlight in the appearance design;

In the past year, smart products around home services have constantly surprised us and swept the floor , catering service robot , home care products, home medical products, etc. Due to technical level, lack of industry norms and other restrictions, various products are mixed, but it is certain that the gap in the home intelligent service product market is objective. Perhaps in the near future, home intelligent service products will usher in a major breakthrough and become an indispensable "intelligent housekeeper" in every family 。

PS：

In the spirit of communication, from the great After searching, I found a 5V , Model: 28BYJ, the manufacturer will not show it to avoid the suspicion of advertising.

The parameters are as follows:

From the parameters, the step angle is 5.625 degrees, that is, a pulse rotates 5.625 degrees, and a revolution is 360 degrees, which requires 64 pulses to complete. Torque, transmission ratio, etc. shall be adjustable through gear set.