Yes. FLEXBOOL PLC is based on ESP32 processor and fully compatible with Arduino IDE. Thus аll Arduino math and logic functions as well as many ESP Arduino libraries are compatible and can be used in your code. Please also check our SOFTWARE chapter for the FLEXBOOL hardware specific libraries and functions.

Depending on your system's power requirements, you can use 12 or 24V lead acid battery pack. The bulit in smart battery charger of FLEXBOOL PLC is capable to provide up to 1000mA charging current. The battery voltage and the maximum charging current are user-configurable (see the software chapter for the charger configuration functions). Note that the charging current and charge voltage settings do not directly control the Icharge DAC and Vcharge DAC. They are target values. The charge will be controlled by the temperature compensation system. Several constant voltage levels will be used depending on which phase the charger is in - Absorb charge, CC/CV charge, or Equalize charge.

Yes. The RTC has a backup supercapacitor that can keep it operational in the event of a power outage for up to 10 days. If the PLC is left without power for a longer period of time, you can set the RTC date/time using the RTC_SET function described in the SOFTWARE section of our website.

You can supply the PLC from the USB connector only for programming. For normal operation of the PLC, there must be 11-30VDC supply provided to the PLC supply terminals. 

When the UPS battery charger is in use, the PLC power supply voltage must match the battery voltage as follows: 14.4VDC (recommended for 12V battery), or 28.8VDC (recommended for 24V battery).

No. Connecting an external load directly to the battery line will disrupt the battery detection algorithm. To power external devices and sensors from the UPS battery, you can use the DC Output terminals of the PLC - GND, Vout, 5V and 3.3V, observing the maximum rated power for each terminal according to the PLC specification.

No. Pressing the reset button will reset the MCU and all internal PLC chips. It will not affect the user program or the EEPROM stored data.

Yes. There are different approachs and many example codes for ESP32 OTA update that you can use as a reference.

Whatever you need. The 3 buttons on the PLC panel are user-configurable. They can be used for setting of some program parameters like time delays, control setpoints, alarm limits, etc. The developer can also arrange different menu pages on the PLC display, so the PLC user can use the panel buttons to navigate the menu, check and when necessary change different program settings.

Yes, you can define RISING, FALLING, or CHANGE interrupt for each panel button, using the  defineInterrupt() function. See the SOFTWARE chapter of our websitte for the syntax and example code. 

Yes, you can display a full color (64k) image on the PLC display. There is an example code in the SOFTWARE chapter of our website. Note that the display resolution is 240x240px, so the image must be prepared accordingly.

Yes. The RTC has auto-adjustment for months with fewer than 31 days including correction for leap years.

Yes, you can use the  HW_CHECK() function that provides a health status of your controller and returns 1 for a healthy device, or 0 when a hardware problem exists. Depending on your project needs the hardware check can be performed only at startUp, or periodically during the controller operation. In case a hardware problem is detected, the individual health status of the internal ICs can be additionally checked (see the example code).

Yes, you can define RISING, FALLING, or CHANGE interrupt for each digital input, using the  defineInterrupt() function. See the SOFTWARE chapter of our website for the syntax.

Yes, you can use 3-Wire, 2-Wire, or combination of both types (for example 8 x 2-Wire, 4 x 3-Wire, 2 x 3-Wire + 4 x 2-Wire, etc. Check the SOFTWARE Chapter for the channel configuration and sensor's wiring diagram.