15. Problems and their Possible Causes

15.1 Arduino IDE Stops Compiling

There are many possible errors which could be the reason that the Arduino IDE doesn’t successfully compile and stops with an error, e.g. wrong board type/connection/speed chosen. However, there are three types of errors while trying to compile for an ESP32 based board which should be mentioned here:

The error mentions something about “WiFiSPI”?
→ If on ESP32, remove the WiFiSPI folder from the folder src - see step 5 in chap. 2.1.2.
The error mentions something about “ArduinoMDNS”?
→ If on ESP32, remove the ArduinoMDNS folder from the folder src - see step 5 in chap. 2.1.2.
The error mentions something about “EEPROMClass”?
→ Make sure you have the correct ESP32 framework installed (1.0.6 is too old) - see chap. 12.1.2.

15.2 The Red LED of the Adapter Isn’t Lit

Controller is switched off
Adapter isn’t connected with the controller via BSB or LPB
Adapter is incorrectly connected to the controller (CL+/CL- or DB/MB interchanged)
Probably hardware fault of the adapter (defect component, eroor in the construction
Probably loose contact at the bus connector (Rx/Tx or CL+/CL-)

15.3 The Red LED Is Lit, but a Query Isn’t Possible

Probably adapter is connected wrong (usage of G+ instead of CL+)
Probably loose contact at the bus connector (Rx/Tx or CL+/CL-)
Probably wrong pin setting (Rx/Tx)
Probably confused the transistors Q1/Q2
Probably cold solder joints
See subchapter „No Query of Parameters Possible”

15.4 Access to the Webinterface Isn’t Possible

Adapter doesn’t have any/sufficient/unreliable power supply
Adapter or LAN shield isn’t connected to the LAN
IP and/or MAC address of the adapter isn’t correct
Security functions passkey, TRUSTED_IP and/or USER_PASS_B64 activated/deactivated → URL not adjusted, access from wrong IP etc.
Check router and/or firewall settings
Access after power failure and/or restart of the microcontroller isn’t possible → press reset button at the microcontroller
Usage of a microSD card for logging → format as FAT32, execute URL command /D0, maybe try a different card and/or smaller capacity → see chapter 9.1
(Adapter,) LAN shield and/or Arduino/microcontroller is faulty (→ sometimes diffuse problems occured within the usage of cheap clones, maybe try other/original units)

15.5 No Connection to WiFi Possible

Please check whether the definement #define WIFI is active, i.e. the trailing slashes have been removed. An indication that the definement is not active are these error messages in the serial monitior right after booting:

E (1229) esp.emac: emac_esp32_init(349): reset timeout
E (1229) esp_eth: esp_eth_driver_install(214): init mac failed

Furthermore, BSB-LAN can not connect to hidden WiFi networks. The only way to do this is by entering the BSSID of the WiFi network into the variable bssid in the configuration file BSB_LAN_config.h.

15.6 No Query of Parameters Possible

See subchapter „The Red LED of the Adapter Isn’t Lit”
See subchapter „The Red LED Is Lit, but a Query Isn’t Possible”
See subchapter „Access to the Webinterface Isn’t Possible”
Rx and/or Tx assignment isn’t correct, pinout and/or connection of the adapter doesn’t fit to the settings in BSB_lan_config.h
Wrong bus type (BSB/LPB)

15.7 Controller Isn’t Recognized Correctly

See subchapter „The Red LED Is Lit, but a Query Isn’t Possible”
See subchapter „No Query of Parameters Possible”
Controller is switched off
Controller was switched on after the microcontroller (automatic detection of the controller doesn’t work in that case) → restart the microcontroller
Controller is not or not in the right way connected with the adapter
Device family and variant of the controller isn’t known yet → check http://<IP-Adresse>/6225/6226 and report the output

15.8 Heating Circuit 1 Can’t Be Controlled

Adapter probably defined as room unit 2

15.9 Room Temperature Can’t Be Transmitted to Heating Circuit 1

Adapter probably defined as room unit 2
Possible access of the adapter is readonly → write access must be granted (webconfig /C: “write access” must be set to “standard” or “complete”)

15.10 Heating Circuit 2 Can’t Be Controlled

Adapter probably defined as room unit 1

15.11 Room Temperature Can’t Be Transmitted to Heating Circuit 2

Adapter probably defined as room unit 1
Possible access of the adapter is readonly → write access must be granted (webconfig /C: “write access” must be set to “standard” or “complete”)

15.12 Settings of the Controller Can’t Be Changed via Adapter

Possible access of the adapter is readonly → write access must be granted (webconfig /C: “write access” must be set to “standard” or “complete”)

15.13 Sometimes the Adapter Doesn’t React to Queries or SET-Commands

The microcontroller doesn’t have multitasking capability - wait until a query is done (e.g. especially extensive queries of many parameters, whole categories or a big logfile may take quite a long time)

15.14 ‘Nothing’ Happens at the Query of the Logfile

No microSD card is inserted in the slot
Logging to microSD card was or is deactivated
The logfile can get quite big, a query may take quite a long time
The graphical display (http://<IP-Adresse>/DG) of the logfile can’t occur because of JavaScript-blockers within the browser

15.15 No 24-Hour Averages Are Displayed

The specific definement isn’t activated
No parameters for the calculation of the 24h-averages are set

15.16 ‘Nothing’ Happens at the Query of DS18B20/DHT22 Sensors

There are no sensors connected
The specific definements aren’t activated
The pinout isn’t set correctly
The sensors are faulty or defect

15.17 The DS18B20 Sensors Are Showing Wrong Values

Check power supply and whole installation (check size of the pullup-resistor, use capacitors, check wiring, use correct topology etc.)

15.18 The ‘Serial Monitor’ of the Arduino IDE Doesn’t Provide Data

Adapter isn’t (additionally) connected via USB to your computer
Wrong COM port or type of microcontroller board is chosen
Wring baud rate is set → set to 115200 baud
Adapter isn’t connected to the controller and/or controller is switched off → see subchapters above

Further on to chapter 16
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