You are welcome. I am happy to have such a wonderful community!

Please show us your findings! Merry Christmas, too

Great! Thanks for your feedback.

Sounds like a fun project. I wish you success!

Good timing!

:-)

You are welcome. Giving up after a few days only usually is no good option...

You are welcome!

:-)

Enjoy!

:-)

:-)

I more or less stopped BLE on the ESP32 because it was not very stable. Maybe they changed it in the meantime. But it does not seem to have a high priority for Espressif

You are welcome!

Thank you!

Good luck!

I did not try it since then...

You are welcome. The next episode should be out by now.

That should now be possible together with my cat video (weight measurement)

You are welcome!

:-)

Welcome to the channel!

Thank you for your kind words!

@@AndreasSpiess yep, when you publish your struggles and problems it makes the video very accessible and easy for learners. It helps us see that the subject is accessible and do-able instead of being really heavy and difficult. Lots of UKpostsrs edit out their mistakes, try to be big-headed and try to make themselves look like experts. There's an important difference between someone trying to make themselves look good vs someone who is really trying to encourage learning.

Maybe it is the opening for many other questions like energy consumption, deep sleep, range and others...

:-)

Enjoy tinkering!

Glad you think so!

I have a pro in the mail. We will see what I will do with it. For the moment I have no special project in mind

I am also glad we can use BLE now for our projects.

:-)

You are welcome!

Thanks for the feedback. Maybe I will have a look into beacons later.

ok. In the case it may be useful my last message on ESP32-snippets (by qrpfun) github.com/nkolban/esp32-snippets/issues/271

Thanks for the link. I will have a look at ir

You are welcome!

I am not retreated. I still work. Here we stop at 65 and I am only 61 :-(

:-)

You are welcome!

ESP32 cannot do it and I hardly understand 4.0 ;-)

You are welcome!

Thank you. UKposts does not allow links anymore. I changed the code.

I did not further work with BLE. So I am not a big help. But I think, together with Goole you will be able to find a solution. BLE is not limited to the ESP32 and maybe somebody else solved it.

banggood methinks. and yes power consumption is really an interesting race for these gadgets now.

1. MQTT should be easy. 2. I am also interested in power consumption ans sleep modes.

I'd like to find a very low powered, programmable device with built-in BT (like the ESP32) to build BLE sensors. If you know of one, or how to make the ESP32 run like that - maybe on its super low power processor - that might be interesting. Then you could make a cat food monitor without a USB lead to trip her up as it would run for years on a button battery!

BLE sensors need to work with a CR2032 battery for six months to a year . ESP32 is good for making a cheap BLE to WiFi Gateway ( instead of having a full raspberry 3 for example ) . If you need a simple BLE sensor you should perhaps try the nRF or Dialog BLE chips . They even cut consumption by selecting the right amount of flash memory model needed for each application down to a few nA in sleep mode !

Thank you!

:-)

Can confirm it is working w. LoPy boards: twitter.com/HB9FXQ/status/942343732405391361

Thanks for your feedback!

I think many things are possible, but I am a beginner in this topic.

I did not do this work so far. I am a real BLE beginner and just started the journey...

I do not know :-(

No, I never used BLE on Windows

No not yet

Andreas Spiess i'm sure you'll update us on that topic :) keep up the good work!

:-)

Shane Bekker have you see some MCU’S with BLE 5.0? I think they re not Comercial at this time

ESP32 is not on 5.0 So we have to wait...

BLE 5.0 is backward compatible. Yes, all info from this vid will work with BLE 5.0.

BLE is a complete standard. If you able write, the complete standard then you able to access the ble. The RF is only a hardware function. The ble is a standard and protocol. That is not hard just time consuming and involved...

It should. But this is an old video and I do not remember the details.

@@AndreasSpiess Ok can thanks. BTW have you tried pushing real-time sensor data with timestamp onto the firebase database for the purpose of data analytic.

I am not a BLE specialist. But I think, if you can transfer one characteristic, you can also transfer the other values. You find a link for all defined GATT services.

I do not understand your question :-(

Unfortunately, I do not know more than presented in this video. And I do no more remember all details. I think the links to the underlying documentation is in the comment. Maybe you find a solution.

I never made a project with a smartphone.

This is a quite old video, so I do no more remember the details. Sorry.

@@AndreasSpiess Not to worry, I think I've worked it out. That of the byte array, the first entry array[1] is the binary flags for the BLE characteristic.

I do not know. Unfortunately, I am not a BLE expert.

It should be possible. I found this link: github.com/asterics/esp32_mouse_keyboard . It is not for the Arduino platform.

I have no plans for BLE for the moment. But this can change if more functionality appears.

I do not know more than written into the post you mention and my example files. They worked at that time and I did not touch BLE since.

@@AndreasSpiess ok. Thanks anyway!

This is and old video and I do no more remember the details :-(

Exactly...

Maybe too complicated for me...

You have to be more specific.

There seem to be several software revisions. So you have to experiment, change the different values of the sensor and watch which values in the client change. I did not do it so far, but mine worked with the app (after upgrading to the newest firmware)

I worked with chegewara on this & we found that there seems to be a problem communicating with this device using the Arduino IDE. You can read packets from it OK but are unable to command it to go into real-time reporting so it continues to report default data (AA BB CC....). It all works fine if you use the esp-idf instead.

Aha. So it is a problem of Neils implementation?

Can you upgrade the firmware without using the app? I was not aware of it.

I had to do it with the app

Dang it, the nomenclature of server and client is confusing, since they are kind of acting like both at different times. What I meant to say is that the sensor seems to want to be a (ble) client, listening for a (ble) server to ask for data, and sending the data when the (ble) server asks . The (ble) server could display, record, modify, or utilize the sensor data. The GAP and GATT roles can be switched and mixed as one needs, I guess: community.nxp.com/thread/332319

There is a two-way communication between the two devices. If someone calls a data transmitter a "server" then it changes all the time. AFAIK server and client are not very well defined roles and were the reason for a lot of confusion also in the past. For me (and this seems also the way GATT sees it) the server is connected to the sensor and the client to the "display". That is easy enough to be understood by me ;-)

Thank you. Certainly most of the documentation always refers to the (GAP) peripheral sensor as a (BLE) server and the (GAP) central as a (BLE) client. After studying more, If I were implementing my own heart monitors and displays (for something like a gym or hospital), I would probably emulate i-beacons, cramming the data into parts of the advertising data and scan response GAP payloads (whatever is allowed by i-beacons). Then I could monitor multiple sensors at once. With something like temperature sensors, you could save a lot of battery by adjusting the frequency (and power) of the advertising data payloads going out, since it also advertises how frequently GAP advertising data payloads will be sent out. It would never actually connect, it would just send out advertising data payloads that match the i-beacon/eddystone format containing the data. Thank you for your helpful videos. Sorry to drag you back here :) I bet you end up exploring beacons at some point either for energy savings, or very accurately triangulating people's location in buildings and such using multiple beacons and their signal strength (in an app running on a person's phone). There I go trying to run before learning to walk again.

I have no idea about connecting smart watches

Yes. And thank you.

It should be possible to find the number of your HR sensor and filter on it. But I do not have the exact code. Maybe you find a similar project?

thanks for prompt answer, ok, thats a pity, but lets see if otherones have an idea. @@AndreasSpiess

Did you look ath the code? (BLEDevice::init("FT7");)

Andreas Spiess yes, the same!

FT7 is the name it displays

I do not know. But I think, it is variable (maybe not in the Arduino IDE). But on the ESP32, most of the current is used because the device is on for way too long, not for the BT sender.

I had a similar question. The RSSI or dBm adjustment file. That will determine the range and application space. One can use more Powerful dBm for Controlled indoor application.

I never tried BLE with micropython

@@AndreasSpiess Thanks. Bluetooth with micropython on esp32 see s very challenging and not well documented. If you search for a project here is one. Do what is in next video using python.

@Andreas spiess, here is the correct link : ukposts.info/have/v-deo/g5Jhmp1_b32aunU.html Really nice project, isn’t it?

:-)

Unfortunately I cannot do remote debugging. I never saw this error.

You have to google what services the HM10 exposes and simulate them with the ESP32. did you have a look at this project: "github.com/joelszy/ESP32-HM10"

Maybe. If they use an official profile. I do not know tile.

@@AndreasSpiess Tiles are (I think BT) key fobs used to find lost keys, bikes or other items. The Tile app searches for Tiles and maps their GPS location by any phone running the Tile app in the background. I was wondering if the esp32 could emulate a Tile.

I never used classic

Andreas Spiess thank you. I cand detect the esp32 on android and laptop but on ios/iphone i cannot, i am not sure what I am doing wrong

github.com/komoot/BLEConnect

I love komoot because it is quite precise with telling me the road quality also in other countries. What would be the goal of such a project?

To get navigation information from phone to motorcycle display (i have talked about this project with Onno Dirkzwager because plan is to use also iotappstory in this project). I think i have to work more with Kamoot. At least roads at my neighborhood are partly missing, but Kamoot is using OpenStreetMap so i can make that better.

If a BLE device is connected to another device (Smartphone, watch) it stops to send advertising signals.

UKposts is only my hobby and, unfortunately, I have no time for consulting :-(

@@AndreasSpiess 😢😭

Maybe you ask this question on Github (BLE library, nkolban). He is the creator and knows much more about his code than me.

I have no idea. But maybe you re-install the ESP32 support. Something seems to be wrong with it.

Thank you for your reply. Yes, it turns out wrong ESP32-BLE library from Git-Hub. Please guide to everybody there is ESP32-BLE-Arduino library. I enjoy your video..

It is a standard ESP32 which consumes around 80mA.

Search for garmin and esp32

I never tried it.

@@AndreasSpiess May be it's not easy....

There are a few videos around. just google.

I do not know

How to see what is loaded in the memory of the device. You cannot see it. You have to know what you loaded into the memory. Maybe there is a possibility to extract the low level code, but this is not very readable for humans How to erase the contents of the memory For sure there are functions to erase flash memory. But I do not know them. However, this is usually done by the programmer itself before it uploads the new code. How to load different firmware, for example, MicorPython then back again to ESP8266 original firmware. As soon as you load something on the ESP8266 all flash memory is erased. So you can switch firmware just by loading a new one on the device List the tools for best carry out the listed items above. I use the Arduino IDE to do that. Micropython has its own infrastructure to work with the ESP8266. And there are more tools available. However, the Arduino IDE is best for beginners. Discuss NodeMCU memory amounts used and why. Have seen discussion on 1Meg and 4Meg but not sure how they are implemented. Most ESP8266 boards have a 4MByte Flash chip. Old ESP-01 boards have only a 1M chip. You select the chip size before compiling and uploading your code in the IDE. Lastly, if you can dumb it down I am a hobbyist and started my journey down using IOTs a few months back and need all the hand holding I can get. There are many videos around on how to get started with the ISP8266. Maybe you watch one or two of them. It is not very complicated.

We will see...

Unfortunately I cannot do remote debugging :-(

Exactly as described in this document. But you might have to read it a few times and try. Use NRF connect to see what is sees. This will help you to correct your code. Maybe you use my fake Polar sensor sketch as a reference. Yours seems to be more complicated, though.

I have tied your sketch with success.. I think I'm stuck with the Characteristics.setValue.. the HeartRate Flags is 8bit, and the Location is 16bit... should I split it? byte location[xx] = { 0b00100000, 0b00000000,.. and so on.. ? All I get in NRF connect is an array of hex(?) values... Anyway... I will have a closer look at it next year... :) Happy New Year!

You have to understand each byte and first distinguish, which you need and which not. Then, you have to fill /decode the important ones. Takes some time but is possible. Happy New Year, too.

Today I got TPMS sensors with BLE and tought it would be easier to use them than 433 MHz. I was wrong. Messed around with BLE on the RPI. Also a mess in my opinion.

So far I did not read any other comments like that if I remember right.

github.com/SensorsIot/Bluetooth-BLE-on-Arduino-IDE/issues/3 Looks like it is a config issue with the esp32/arduino library at least on windows. Modifying the boards.txt file removed the issue, still I'm not able to get any output on the serial monitor after compiling and configuring your sketch.

I saw the issue too now. BLE is still under heavy development for the Arduino IDE...

AFAIK you can receife these messages as often as you want. As long as the Oximeter is not connected it sends these messages to everybody

legoscratch i like to see that too

With an e-ink display maybe...

Thank you for the link. I will try it over the Christmas days.