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evaluation wrote:

(...) do start this access point by poweing it down and up 5-6 times. But is does not work anymore.
Do you have any idea what happened and how I can solve it?
I already flashed the device again with OpenBeken and were able to create a backup. So the communication with the BK7231T chip is still working fine.

It sounds like you have done a great job so far in flashing the OpenBeken firmware to your BK7231T chip and initially getting it to work. However, the issue with the device not creating its internal access point (AP) and not responding to the power cycle method suggests there might be a configuration or firmware-related issue. Let's troubleshoot the issue step-by-step and explore potential solutions.

Step-by-Step Troubleshooting

1. Verify Power Cycling Method:
- Ensure you are following the correct power cycling procedure. Typically, the device needs to be powered on and off in quick succession (5-6 times) within a specific time frame to trigger AP mode.
- Confirm that the timing of the power cycles is consistent with the instructions provided by OpenBeken.

2. Check for Configuration Issues:
- Since you can still communicate with the BK7231T chip, check the current configuration settings. There might be settings preventing the device from starting the AP.
- Look for any settings related to Wi-Fi modes, AP behavior, or network configurations that might need adjustment.

3. Factory Reset:
- If possible, perform a factory reset of the OpenBeken firmware. This should revert the device to its default settings, including enabling the AP mode. Check the OpenBeken documentation for the factory reset procedure.

4. Check Logs and Diagnostics:
- If OpenBeken provides access to logs or a diagnostics interface, review the logs for any errors or warnings related to Wi-Fi or AP mode.
- Look for any specific error messages that might indicate what is preventing the AP from starting.

5. Re-flash the Firmware:
- Although you have already re-flashed the firmware, it's worth trying again to ensure no issues occurred during the process. Use the latest stable version of OpenBeken, and verify the integrity of the firmware file before flashing.
- After re-flashing, perform a factory reset to ensure the device starts with default settings.

6. Check for Hardware Issues:
- While less likely, it's possible there could be a hardware issue affecting the Wi-Fi module. Inspect the PCB and components for any visible damage or loose connections.
- Ensure the power supply is stable and providing sufficient power to the device.

Potential Solutions

1. Reconfigure via Serial Connection:
- If the device has a serial interface, you might be able to connect via a serial terminal and reconfigure the Wi-Fi settings directly.
- Use a serial-to-USB adapter and connect to the BK7231T chip's serial interface. Access the console and check or modify the Wi-Fi settings to re-enable the AP mode.

2. Manual Configuration File Edit:
- If OpenBeken allows for manual editing of the configuration file, you might be able to modify the settings directly. This could involve downloading the configuration file, editing it to re-enable AP mode, and then re-uploading it to the device.

3. Consult OpenBeken Documentation and Community:
- Review the OpenBeken documentation and any available troubleshooting guides. There might be specific instructions for resolving AP mode issues.
- Engage with the OpenBeken community or support channels. Other users might have encountered similar issues and could offer insights or solutions.

Example Commands for Serial Configuration (Hypothetical)



Final Thoughts

By following these steps and exploring the potential solutions, you should be able to diagnose and hopefully resolve the issue with your BK7231T chip not creating the internal access point.

If you encounter specific errors or need further assistance, please share more details about the configuration settings, logs, or any error messages you observe, and I'll be happy to help you troubleshoot further.

Tilator wrote:

While power is lost and comes on again, OpenBeken devices boot up first and router giving DHCP after that.

Then OpenBeken devices get IP address, but router seems to be missing OpenBeken device names.

How can I fix this?

The issue you're experiencing with OpenBeken devices not retaining their names in the router's DHCP client list after a power interruption is a common problem in scenarios where devices boot up before the router can fully provide network services. Here’s a detailed approach to help fix this issue:

Understanding the Problem
When power is restored, OpenBeken devices boot up faster than the router. Because the router takes additional time to fully initialize and provide DHCP services, the OpenBeken devices might not properly register their hostname with the DHCP server or might get an IP address before the router can assign a name.

Solutions to Retain Device Names

1. Enable Static IP Assignment:
Static IP addresses can prevent the issues caused by DHCP delays. Assign a fixed IP address to each OpenBeken device either through the OpenBeken configuration or directly in the router's settings.

Router Configuration:
- Access your router's administration interface (usually accessible through a web browser).
- Locate the DHCP settings or the section where you can manage DHCP reservations.
- Add a reservation for each OpenBeken device using its MAC address, assigning a specific IP address and hostname.

2. Increase Device Boot Time Delay:
Introducing a boot delay in the OpenBeken firmware might allow the router more time to initialize before the devices request IPs.

OpenBeken Configuration:
- Modify the OpenBeken settings to implement a delay before attempting to connect to the network.
- You might need to explore the firmware documentation or source to add a delay (often configurable in seconds) to the device’s initial startup script.

3. Use mDNS/Bonjour for Device Discovery:
Implementing mDNS (Multicast DNS) allows devices to discover each other on the local network without relying on traditional DNS services.

OpenBeken Configuration:
- Check if OpenBeken supports mDNS (also known as Bonjour in Apple devices). This service broadcasts device names and services locally.
- Enable mDNS in the OpenBeken settings, if available. This will help your devices announce their presence and names independently of the router's DHCP.

Detailed Instructions

Static IP Assignment

1. On the Router:
- Log into your router (usually at `http://192.168.1.1` or similar).
- Navigate to the DHCP section. It might be under Network Settings, LAN, or Advanced Settings.
- Find the section for DHCP reservations.
- Add a new reservation: Input the MAC address of your OpenBeken device, the desired static IP address, and the hostname.
- Save the changes and reboot the router if necessary.

2. On OpenBeken Device:
- Connect to the OpenBeken device’s web interface.
- Go to Network Settings.
- Select "Static IP" and input the IP address, subnet mask, gateway, and DNS server.
- Save and reboot the device.

mDNS Configuration

1. Check OpenBeken Support:
- Ensure the OpenBeken firmware version you are using supports mDNS. Check the documentation or firmware repository for this feature.

2. Enable mDNS:
- Access the OpenBeken device’s web interface.
- Navigate to the Network or Advanced Settings section.
- Find and enable the mDNS setting.
- Save and reboot the device.

3. Verify mDNS Operation:
- Use a network scanner app on your smartphone or a tool like `avahi-browse` on Linux to verify that the device broadcasts its name on the network.

Additional Considerations

- Firmware Updates: Ensure both the OpenBeken firmware and the router firmware are up-to-date. Updates might include improvements and bug fixes related to DHCP and network handling.
- Network Configuration: Review your network setup. Ensure there are no conflicts or misconfigurations that could be causing the issue. This includes checking the DHCP lease time and ensuring no network segments or IP ranges are overlapping.
- Device Reinitialization: After making changes, perform a controlled power cycle: power off the devices, then the router. Power on the router first, wait for it to fully initialize, then power on the OpenBeken devices.

Example Configuration File Edits (Hypothetical)

If manual configuration on the OpenBeken firmware is needed, you might edit a configuration file (if firmware supports this method):



By setting static IPs and possibly enabling mDNS along with a boot delay, your devices should be able to retain their names and function correctly even after power interruptions. If you need further assistance, feel free to provide more details about your setup, and we can delve deeper into the problem.

Tilator wrote:

(...) following these steps, you should be able to ensure that your OpenBeken devices consistently register their hostnames with the router after a power cycle. If the issue persists, providing more details about your router model and OpenBeken device specifics would help in suggesting more targeted solutions.

It sounds like you're experiencing a common issue where your OpenBeken devices boot up and request IP addresses from the router before the router's DHCP server is fully operational. This can lead to the devices receiving IP addresses but not being properly registered with their names in the router's DHCP table. Here’s a detailed breakdown of the problem and potential solutions:

Problem Analysis

1. Power Loss & Startup Sequence: When power is lost and then restored, both your router and OpenBeken devices reboot. However, the OpenBeken devices boot up faster than the router.
2. DHCP Request Timing: The OpenBeken devices send DHCP requests for IP addresses before the router's DHCP server is fully ready.
3. Incomplete Registration: The router assigns IP addresses to the OpenBeken devices, but it doesn’t register their names because its device name resolution or network scanning functionalities are not yet fully operational.

Potential Solutions

1. Delay OpenBeken Boot-up

One way to address this issue is to delay the boot-up of your OpenBeken devices, allowing the router to be fully operational before the devices request IP addresses.

- Check for Delay Settings: Look into the settings of your OpenBeken devices to see if there is an option to delay their network connection on startup. This delay can give your router enough time to be ready.
- Use Smart Plugs: If the devices do not have a built-in delay setting, consider using smart plugs with staggered power-on schedules. Set the OpenBeken devices to power on a few minutes after the router.

2. Configure Router Settings

Adjusting settings on your router can also help ensure that the OpenBeken devices are properly registered.

- Increase DHCP Lease Time: Log into your router’s configuration page and navigate to the DHCP settings. Increasing the DHCP lease time ensures that devices retain their assigned IPs for a longer period, reducing the frequency of DHCP requests during startup.
- Assign Static IP Addresses: Assign static IP addresses to your OpenBeken devices within the router’s DHCP reservation table. This bypasses the dynamic assignment process and ensures consistent recognition.

3. Update Firmware

Ensure that both your router and OpenBeken devices are running the latest firmware versions. Firmware updates often contain bug fixes and optimizations that could address this issue.

- Router Firmware: Check the manufacturer’s website for the latest firmware version for your router and follow the instructions to update it.
- OpenBeken Firmware: Similarly, check for firmware updates for your OpenBeken devices and update them accordingly.

4. Modify OpenBeken Configuration

You can configure your OpenBeken devices to broadcast their names to the network before they receive an IP address.

- Access Configuration File: The configuration file for OpenBeken devices is typically stored in the device’s LittleFS file system. You can access this file through the OpenBeken web interface or by using a tool like the OpenBK7231T flash tool.
- Set DHCPName and DHCPWait Options: Modify the configuration file to include the `DHCPName` and `DHCPWait` options. This ensures that the device broadcasts its name to the network and waits for the router to be ready.

Example configuration:


- Restart the Device: After making these changes, restart the OpenBeken device to apply the new configuration.

Troubleshooting Tips

- Power Cycle: Perform a full power cycle by turning off both the router and OpenBeken devices, waiting a few minutes, and then powering on the router first, followed by the OpenBeken devices.
- Monitor Device List: After the network stabilizes, check your router’s device list or connected devices page to see if the OpenBeken devices are now being recognized with their names.

Conclusion

By following these steps, you should be able to ensure that your OpenBeken devices consistently register their hostnames with the router after a power cycle. If the issue persists, providing more details about your router model and OpenBeken device specifics would help in suggesting more targeted solutions.

dufu wrote:

@ElektrodaBot show me example of using addRepeatingEvent with multiple commands. I need to publishFloat several parameters periodically.

Initial assessment
You want one timer that periodically runs several commands, each of which publishes a floating‑point value (e.g., multiple channels/sensors) over MQTT from an OpenBeken device. In OpenBeken you can:
- Schedule commands at fixed intervals with addRepeatingEvent or addRepeatingEventID. Syntax: addRepeatingEvent [DelaySeconds] [Repeats] [Command]; with Repeats = −1 for endless repetition. The ID variant lets you later cancel by ID. (elektroda.com)
- Publish numbers as floats with expressions using publishFloat <topic> <expression>. Expressions may use channels, e.g., $CH20*0.1. (elektroda.com)
- Chain multiple commands as one action using backlog cmd1; cmd2; cmd3; which is ideal when a scheduler must execute more than one command. (elektroda.com)

Below are ready‑to‑paste patterns.

Direct answer (two proven patterns)

1) Use an alias to keep the scheduled action short (recommended)
- This avoids URL length limits if you push it via /cm and keeps your schedule readable. (elektroda.com)

To stop it later:

(elektroda.com)

2) Put all publishes directly in the timer with backlog

(elektroda.com)

Replace $CH1/$CH2/$CH3 with your actual channels and any scaling (e.g., $CH20*0.1). (elektroda.com)

Detailed notes and good practices

- Choosing between addRepeatingEvent and addRepeatingEventID
- Use addRepeatingEventID when you need to later cancel or replace a specific schedule by number. The form is addRepeatingEventID <id> <seconds> <repeats> <command>. Then cancelRepeatingEvent <id>. (elektroda.com)

- Where to put this so it survives reboot
- Save the lines above in LittleFS as autoexec.bat (WebApp → Files) so they auto‑run after power loss. This is the usual way to persist OBK scripts. General backlog/cURL examples and persistence tips are shown in the OpenBeken automation articles. (elektroda.com)

- Keep the interval sane
- The scheduler ticks at ~1 s resolution; don’t publish too fast or you’ll flood your broker/UI. Ten seconds is a common choice. (elektroda.com)

- Keep long actions short at the trigger point
- Prefer alias pub_all … and schedule the alias (pattern 1). If you send the whole line via HTTP /cm, some stacks historically clipped single-command buffers around 128 bytes; aliasing avoids this. (elektroda.com)

- Publishing format and topics
- publishFloat sends a numeric payload to <deviceShortName>/<topic>/get by default (OBK auto‑prefix). If you need a fully custom topic without the OBK prefix and “/get”, use the plain publish command with its bRawMode argument. Example: publish my/raw/topic 12.34 1. (elektroda.com)

- Alternatives when you only need built‑ins
- For power‑monitoring plugs that already publish V/I/P, you can adjust the built‑in cadence instead of scripting, e.g., SensorInterval, PowerMonitorInterval or newer VCPPublishIntervals. Use scripting when you need custom topics, scaling, or to aggregate from several channels. (elektroda.com)

Practical examples you can adapt

- Scale and publish temperature and humidity every 30 s

(elektroda.com)

- Publish a compact JSON string alongside the floats (optional)

If your subscriber expects an unprefixed topic, use: publish telemetry/device {"V":...} 1. (elektroda.com)

Troubleshooting

- Nothing appears on MQTT:
- Verify broker settings and that MQTT is connected (MQTTState). Try a one‑shot publishFloat from the Console to confirm. (elektroda.com)
- Event created but not running:
- List/inspect events, then cancel and recreate with a known ID: listEvents, cancelRepeatingEvent <id>, re‑add. (elektroda.com)
- Values look wrong:
- Many Tuya sensors report in tenths/hundredths; multiply by 0.1/0.01 in publishFloat as shown. (elektroda.com)

Brief summary
- Put your multi‑publish logic in an alias, then schedule it with addRepeatingEventID <id> <sec> -1 <alias>. Use publishFloat <topic> <expression> for each value, optionally with scaling. Cancel or replace by ID when needed. (elektroda.com)

Questions for you
- Which exact channels/units do you want to publish, and to which MQTT topics? If you share a screenshot of your Channels page, I’ll tailor the alias and scaling factors for you.

mahmoudamsh wrote:

@ElektrodaBot شرح ckv

Users posts before the question:
```
Data: 27/12/2025
Treść: @ElektrodaBot show me example of using addRepeatingEvent with multiple commands. I need...

Direct answer

If you mean CKV in LCD/LED TV panel repair, then CKV = Clock Vertical or vertical scan clock. It is one of the timing signals used to drive the gate/row driver of an LCD panel. Its job is to help scan the display line by line from top to bottom.

In simple terms:

> CKV tells the LCD panel when to activate the next horizontal row of pixels.

It usually works together with CKVB, which is the complementary or opposite-phase clock signal.

Main CKV-related signals

Signal	Meaning	Function
CKV	Clock Vertical	Vertical row clock / gate scan clock
CKVB	Clock Vertical Bar	Inverted or complementary CKV
STV / STVP	Start Vertical	Starts the vertical scanning sequence
OE / GOE	Output Enable	Enables or blanks gate output timing
VGH / VON	Gate High voltage	Turns TFT row transistors ON
VGL / VOFF	Gate Low voltage	Turns TFT row transistors OFF

In TFT-LCD driving circuits, timing-controller logic such as CPV, OE and STV can be processed into CKV, CKVB and STVP signals for the gate driver. The gate driver then activates the panel rows in sequence. (patents.google.com)

How CKV works

An LCD panel is driven in two directions:

1. Source drivers send image data to the vertical column lines.
2. Gate drivers select one horizontal row at a time.

The CKV signal belongs to the gate-driver side.

The sequence is approximately:

1. STV/STVP starts the frame scan.
2. CKV / CKVB pulse alternately.
3. Each pulse advances the gate-driver shift register.
4. One row of TFTs turns on.
5. The source driver writes pixel voltages into that row.
6. The row turns off and the next row is selected.

So if CKV is missing, distorted, shorted, or at the wrong voltage level, the panel cannot scan correctly. You may get a white screen, black screen, double image, shaking image, horizontal lines, or partial display.

The CKV and CKVB rising edges are typically arranged alternately so that gate-driving signals are output row by row. (patents.google.com)

CKV voltage level

CKV is not usually a small 3.3 V logic signal at the panel side. The T-CON or level-shifter section converts low-voltage timing into high-voltage gate-drive pulses.

Typical gate-drive rails are:

Rail	Typical value	Purpose
VGH / VON	about +12 V to +25 V, sometimes higher depending on panel	TFT gate ON voltage
VGL / VOFF	about −5 V to −15 V	TFT gate OFF voltage

The gate driver uses VGH to turn a TFT row on and VGL to turn it off. (orientdisplay.com)

In many TV panels, CKV swings between these two rails, for example approximately:



Some TV panel PMIC/level-shifter ICs generate supplies such as VGH, VGL, and multiple CLK outputs for GIP/GOA LCD panels. (ti.com.cn)

Where CKV is generated

Usually the path is:



In modern slim panels, the gate driver may be integrated directly into the glass. This is often called:

- GOA — Gate On Array
- GIP — Gate In Panel

That is why CKV faults are often panel-related and not always repairable by replacing the T-CON board.

Common symptoms of CKV problems

A CKV fault may cause:

- Backlight on but no image.
- White screen.
- Half-screen image.
- Double image.
- Horizontal lines.
- Flickering picture.
- Picture shaking vertically.
- Slow-motion image.
- Image appears for a moment, then disappears.
- VGH/VGL voltage appears briefly and then collapses.

If CKV is shorted inside the panel, the DC-DC converter or level shifter may enter protection, causing VGH/VGL to drop.

How to diagnose CKV

1. Check panel voltages first

Measure:



If VGH or VGL is missing, unstable, or pulsing, suspect:

- shorted CKV/CKVB line,
- bad level shifter,
- defective T-CON power circuit,
- short inside panel glass.

2. Use oscilloscope, not only multimeter

A normal multimeter is not enough for CKV because CKV is a pulse waveform. A multimeter may only show an average value, which can be misleading.

With an oscilloscope you should see:



TFT-LCD driver datasheets specify timing parameters such as delay to CKV and CKV pulse width, confirming that CKV is a timing waveform, not a static DC voltage. (phoenixdisplay.com)

3. Compare left and right side

If the panel has two gate-driver sides or two flat cables from T-CON to panel:

- disconnect one side carefully,
- power on briefly,
- see whether one half of the image becomes normal.

If one side works and the other side causes the fault, the bad side may have a CKV/CKVB short.

Repair approaches

Tape method

For some panels with flat ribbon cables, technicians isolate selected CKV/CKVB/STV pins using thin insulating tape. This can sometimes bypass a bad gate-drive side.

This is not a true repair. It is a workaround.

Possible result:

- TV works again,
- picture may be acceptable,
- one side of gate drive is disabled,
- long-term reliability is uncertain.

Track cutting

On some panel boards, technicians cut the CKV/CKVB tracks going into the defective side of the panel. This is more invasive than the tape method.

This should only be done if:

- the CKV lines are clearly identified,
- measurements confirm which side is faulty,
- the panel would otherwise be scrapped.

Repair guides commonly describe isolating CKV/CKVB/STVP lines one pair at a time to see whether the image improves. (archive.espec.ws)

Replacing the T-CON

Replacing the T-CON helps only if the fault is actually on the T-CON.

If the CKV line is shorted inside the panel glass, a new T-CON may also shut down or even become damaged.

Practical warning

Be careful: CKV-related lines can carry relatively high positive and negative voltages. They are not dangerous like mains voltage, but they can damage the T-CON, panel, oscilloscope probe, or meter if shorted accidentally.

Use:

- insulated probes,
- proper ground reference,
- x10 oscilloscope probe,
- no slipping on FFC pins,
- no shorting adjacent pins.

Brief summary

CKV is the vertical clock signal for LCD panel row scanning. It works with CKVB, STV/STVP, OE, VGH, and VGL. If CKV is missing or shorted, the screen may show no image, double image, horizontal lines, flicker, or half-screen faults. Diagnosis is best done with voltage checks plus oscilloscope waveform checks. Tape or track-cut methods can sometimes bypass a panel-side CKV short, but they are workaround repairs, not proper factory repairs.

If you provide the TV model, panel number, T-CON board number, and the symptom on screen, I can help identify which CKV lines to check first.