The values are 16 bit integer values, which have been scaled to reflect the predefined number og significant digits. Key features include the ability to control and monitor via Bluetooth, an easy to read display. Data are send to the APP every second as a block of 20 bytes. Ideal for camper trailers, caravans, 4WD canopies and boats.For the first 60 seconds the connection is possible without the passphrase.If the message is not received, the BLE connection is terminated.This is a hash value of the current time (salt) and a pre-shared pass phrase. A sign-on message is expected by the ESP32.The BLE connection is initialized by the phone.Read the battery voltage and current, calculate the Ah and power and store current battery state to flash Loop: interrupt every 1ms to determine the required action. Compact battery monitor, just 124 x 62mm x 23mm Based on the highly successful BM-1 marine battery monitor, the BM-1 Compact is especially designed for.Setup: reduce CPU clock to save power, setup timers and the external ADC.Settings: define time intervals and used channels in the #define section of the code.The Arduino IDE is used for the code development. Main Screen with current, voltage, capacity.Low energy bluetooth (BLE) connection to the ESP32.It exhibits 4 channels, a wide adjustable voltage range, a build in amplifier and can directly measure voltage differences. The ADC ADS1115 with 16 bit resolution is readily available as a module. The reached resolution is for both cases about 50mA. This makes it suitable to measure the current with sufficient precision, without the need of an additional amplifier. The ADS1115 allows to change the voltage range down to +-256mV. 100A) is placed into the ground connection to the battery. No need to mess with the cabling, since the sensor is just placed around one of the battery cables.Ī commercial shunt suitable for a high current (e.g. Hall SensorĪdvantage: sensor works contactless. Step-down regulator (DC-DC Buck converter)įor a version utilizing the internal ADC, see the Readme Current SensorĪ split core current sensor with a Hall sensor or a shunt resistor is used to measure the current.Current sensor (Hall sensor to measure the magnetic field, or shunt resistor) Shunt based Trimetric Battery Monitors are the most reliable, accurate and economical option to monitor RV and solar batteries.The schematic and the layout of this base board can be found in the Eagle folder. The monitor is based on three modules (DC-DC converter, ESP32, ADS1115), which are placed either on a bread board or a PCB. Of a camper/mobil home 12V battery on an Android Smartphone. Wireless battery monitoring via mobile device - Monitor multiple batteries with the one app - Bluetooth connectivity, free app for iOS & Android. the current flowing from/to the battery (A).capacity in Ampere hours (Ah) of a battery.Battery Monitor with low energy Bluetooth readout
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |