On July 22, 2014, Xiaomi released its first wearable device Xiaomi bracelet. Xiaomi bracelet was produced by Xiaomi Ecological Chain Enterprise (Huami Technology). The price of the first generation of products was 79 yuan at the time, and the current price of the first generation of bracelet was 69 yuan. When it was launched, the supply fell short of the demand. On July 22, 2015, Xiaomi Ecological Chain Enterprise (Huami Technology) released an upgraded version of Xiaomi bracelet, The heart rate monitoring function has been added on the basis of the first generation. The product name is: Xiaomi bracelet optical version (Xiaomi bracelet 1S), which sells for 99 yuan. At present, it is still out of stock.

With many questions, this time I will give you a detailed explanation of the issues you care about (Xiaomi Bracelet Optical Edition).

The product packaging still inherits the traditional style of Xiaomi. The beige small box is also very strong. The design of the box is relatively compact, without too much waste. The accessories are also relatively simple: black wrist strap X1, bracelet body X1, charger X1.

Many netizens and rice fans expect that the second-generation Xiaomi bracelet can be used as a reminder device as well as a watch. However, the second-generation bracelet still adheres to the style of the first generation. The screen time display function you expect is useless. Optical version millet bracelet specifications: 37mm long (36mm for the first generation), 13.6mm wide (14mm for the first generation), 9.9mm thick (9mm for the first generation), 5.5g heavy (5g for the first generation), made of all magnesium aluminum alloy polycarbonate (the same as the first generation), basically the appearance and specifications have not changed compared with the first generation.

There are two charging contacts on the side of the optical sensing version of the Xiaomi bracelet. The ID of the current device is displayed in the groove on the side of the bracelet. This ID is used for product maintenance. The product sold by Xiaomi has one invoice and the order corresponds to one product ID. In order to prevent equipment damage from unlimited free maintenance, this ID is a must.

The back of the light sensing version of the Xiaomi bracelet is a heart rate sensor. The working principle of the sensor is to scan the pulse with the photoelectric part of the sensor, and test the heart rate of the human body by scanning the pulse. Our common electronic sphygmomanometer and so on all have heart rate monitoring function.

After heart rate monitoring is turned on, the monitor on the back of the bracelet displays green light to scan and monitor the pulse.

On the front of the Xiaomi bracelet light sensing version, silver white aluminum alloy design has three LED lights. The LED lights can also be adjusted in multiple colors through the APP to adjust their favorite colors. When charging, the LED lights flash from flicker to constant light with full charge, The 3LED light is always on, indicating that the bracelet is full of power. The capacity of the built-in battery of the light sensing bracelet is the same as that of the first generation bracelet, which is 45mAh. The first generation bracelet has a 30 day standby time. Because the light sensing bracelet has a heart rate monitoring function, its standby time is 10 days. Whether you can be satisfied with the 10 day standby time is known. After all, the heart rate monitoring function is added when the size of the product remains the same, The addition of new functions and other functions is bound to compromise and weaken. This time, the standby time is weakened. If the sleep heart rate auxiliary monitoring is turned off, the standby time of the bracelet is still 30 days. When the heart rate is measured twice a day, the standby time should be about 25 days.

The author has used millet bracelet for a generation, and the most common problem of millet bracelet wristband of the generation is that the main body of the middle bracelet is lost. One friend of the author met with the bracelet with Doudou in the middle, and it was removed and installed between the main body of the bracelet and the wrist strap for many times. Repeated process will definitely lead to the tightness of the wrist strap For the decrease of tightness and strength, I suggest you buy more wristbands.

In terms of the waterproof of the bracelet, the light sensing version of the Xiaomi bracelet has an IP67 waterproof level, so there is no problem in rain or diving. However, it is recommended that you do not take a hot bath with the bracelet, because one cold and one hot may cause water vapor inside the bracelet, which may cause damage to the bracelet. This needs attention.

You can start your bracelet journey by cooperating with the Xiaomi Sports APP and connecting to the Xiaomi bracelet. The main interface of Xiaomi Sports is very simple. You can view the current or previous movement and sleep information by swiping left and right on the main screen, and swipe down to synchronize the movement data on the current bracelet. The synchronization time is about 3, which is also very fast. The setting interface also provides a wealth of settings, which can be turned on or off independently according to the wearing mode and the functions to be used, making the Xiaomi bracelet more suitable for your wearing habits.

Set menu resolution

Find the bracelet: The bracelet vibrates twice. If you forget to put it there, you can open the function of looking for the bracelet to make it easy for users to find it. (The bracelet is placed on the table because with the vibration, the place where the bracelet contacts the table will also make a noise. If you forget to put the bracelet in the quilt, it may not be easy to find it.)

Wearing method: Left hand, right hand, pendant

Screen unlocking: Turn on to unlock the phone without password (It is more convenient to unlock your mobile phone with a bracelet, but the problem is that if you wear a bracelet and your mobile phone is on the desk, if your friend uses your mobile phone and is close to you, he can unlock your mobile phone without wearing your bracelet, which is not ideal for personal privacy protection. Unlocking is convenient, but other people use your mobile phone It's also convenient to unlock, isn't it?, To say that this problem is really not good enough to fully satisfy users, the author has not thought of a better solution at present)

Mobile notification reminder: After opening, you can enter the selection. The APP installed in the mobile phone is listed. We can choose Sina Weibo QQ、 WeChat and other software enable message reminder. At present, you can set up up to 3 app reminders.

Mobile phone call reminder: At present, the minimum setting of Xiaomi bracelet is 3 seconds without receiving a reminder, which is not a real-time reminder (it is recommended to add a reminder function when you call)

SMS alert: SMS reminder

remarks: At present, the number of vibrations for notification reminder, incoming call reminder and SMS reminder is fixed, and users cannot select the number of independent vibrations. It is recommended to increase the number of independent vibrations for users in the future.

Mobile alarm clock reminder: The bracelet end can enable synchronization with the mobile phone alarm clock, that is, the alarm clock set by the mobile phone will be automatically synchronized to the bracelet end. At present, the bracelet can set up up to 3 alarm clocks. (Will it be a little less? It's very difficult for the author to get up, so I usually set at least 6 alarm clocks on my mobile phone to wake me up.)

Heart rate assisted sleep monitoring: Periodically monitor the sleep heart rate after opening, which will affect the standby time of the bracelet

The sensor used by Xiaomi for motion monitoring comes from ADI military gravity sensor. The author has not found relevant information on the Internet, so we cannot tell you how many axes the sensor is. Generally, the sensors of the bracelet have three axes and six axes, which are theoretically designed to monitor motion data more accurately. In addition, the accuracy of motion data after monitoring is also related to big data, The more big data the bracelet displays, the more accurate the data will be.

The simple understanding of big data is that the cloud calls a user's motion data for analysis and comparison, and then synchronizes it to the user's APP display interface. After more users, there will be more and more data sources for comparison and analysis. For the current large user group of Xiaomi bracelet, this big data is very large, So theoretically, the movement and sleep data monitored by Xiaomi bracelet are also close to 90% accuracy. Similarly, if other brands of bracelets also have a large user base and big data, the data monitored will be very accurate.

The movement and sleep data monitored by the Xiaomi bracelet will be displayed in the form of graphics and figures. The interface is simple and easy to understand. At the same time, in terms of sleeping time and waking time, users can independently modify the time to increase data accuracy.

The running function of the optical version of the Xiaomi bracelet calls the Gaud map, and users can choose from two interfaces. The first interface can be selected for indoor or gym running, and the map mode can be opened for outdoor running. After running, there will be a description of the track and running data. What is worth mentioning is the Xiaomi bracelet with heart rate monitoring, The maximum heart rate can be set. We all know that today's fitness exercises, activity marathons and other running activities will explode every year. Sudden death due to heart problems will occur. After users set the maximum heart rate independently, if the dangerous heart rate value is reached during running, the bracelet will vibrate to remind them, At this time, you can remind runners to take a rest to prevent dangerous situations from happening. Although the probability of danger is very low, you are well prepared after all. This feature is worth liking!

Turning to heart rate monitoring, the author can still test the heart rate without wearing the light sensing version of the Xiaomi bracelet. You can see the heart rate value in the screenshot. This suggestion should be optimized later. The user should have an error warning during the process of monitoring without wearing the bracelet, or remind the user: (The bracelet is not worn correctly, please wear it correctly before monitoring).

In order to give the accuracy of heart rate test intuitively and accurately, the author purposely brought an intelligent blood pressure meter to conduct heart rate contrast test. In theory, the heart rate monitoring of the blood pressure meter should be more accurate. The heart rate of three groups of blood pressure meters was 81/83/85, and the heart rate of three groups of bracelets was 89/87/89. It can be seen from the test results that the error in the middle is very small. As a sphygmomanometer, the accuracy will be higher, but it is impossible to guarantee 100% accuracy

The heart rate monitoring time of the sphygmomanometer is about 30 seconds, and the heart rate monitoring time of the bracelet is about 10 seconds. In terms of test time, the sphygmomanometer collects more samples, but the bracelet collects too few samples, which also leads to the error of the above two groups of data. At present, the heart rate monitoring time of the bracelet cannot be set automatically by the system. After repeatedly testing the heart rate, the time remains about 10 seconds, It is recommended to increase the monitoring time selection for heart rate monitoring in the later stage, and select the test time from 30 seconds to 3 minutes. In theory, the longer the time, the more accurate the heart rate will be.

Extraneous remarks: We all know that when we look at the pulse of traditional Chinese medicine, it usually takes at least one minute or several minutes. The profoundness of traditional Chinese medicine makes it possible to tell whether the user is healthy or not by the amplitude and frequency of the pulse, or whether there is a problem with your stomach or other organs and the overall condition of your body. So, If the bracelet can detect whether the person is healthy or not through pulse monitoring, or give a suggestion, for example, if your pulse is abnormal, it is recommended to go to the hospital for physical examination. Or give health advice on what to eat more and what to eat less in terms of diet, will it be better?

Summary:

Extraneous remarks: I am still looking forward to the third generation millet bracelet or watch with heart rate monitoring+time display. After all, it is just a need to watch time. Besides, I also have obsessive-compulsive disorder of watching time. What about you? Is it the same as me?

At present, there are few bracelets with heart rate monitoring function in the price range of 100 yuan. In terms of cost performance, this Xiaomi bracelet optical version does well. From the perspective of practicality, Xiaomi's bracelet seems to lack the time display function. After all, there is a bracelet on the left wrist, a wrist on the right wrist, or a wrist with a watch and bracelet, This kind of matching is really not beautiful. Looking back at the optical version of Xiaomi bracelet, if you don't see the demand for time, I think you will be satisfied with the 99 yuan product experience, provided that you can grab it. If you can't grab it and still want to buy it, then the current price you can buy in the market is about 130 yuan or higher. Again, call for an early opening up to buy Xiaomi, The best experience is that users can buy and use it, right?

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