BLE tools with terminal vs Ohmica

A practical BluetoothLE scanning tool that can connect to BLE Bluetooth devices to obtain information, supports terminal mode, and can set function keys. It is a very convenient tool for developers of Arduino or Raspberry pie. Support the reminder function of Bluetooth device [online]. When the stored Bluetooth device is scanned, a reminder will appear. The distance can be judged by the value of rssi. If there is a Bluetooth headset forgotten where to put it, you can use this function to find . There is also an interesting application method for this function. For example, put the Bluetooth headset in the suitcase when going abroad. When the suitcase turntable sends the luggage out, the mobile phone will remind the user that the luggage is here!

Ohmica — The Electronics Calculator Your Multimeter Doesn't Have Most electronics calculators give you a result. Ohmica shows the result, the formula behind it, the substituted values, and the assumptions used. Because when you're working on a real circuit, understanding the math matters. Built for Arduino, ESP32, Raspberry Pi, makers, technicians, electronics hobbyists, and engineers, Ohmica helps you solve real-world electronics problems quickly and confidently. WHY OHMICA • Shows the actual formula used for every calculation • Displays substituted values for transparency • Supports engineering notation such as 4k7, 100nF, and 20mA • Works completely offline • No account required • No ads • Available in English and Vietnamese Unlike generic calculators, Ohmica lets you verify the model behind the result. For example, when calculating voltage drop, Ohmica can show: Vdrop = 500 mA × 847 mΩ (AWG 14, Copper, 40 m Total Run) You immediately know which assumptions were used and can validate the result with confidence. CORE CALCULATORS Fundamentals • Ohm's Law • LED Resistor • Voltage Divider • Resistor Color Code Passive Components • Series / Parallel Resistance • Series / Parallel Capacitance • RC Time Constant • Capacitor Code • Inductor Code Power & Wiring • AWG Reference • Voltage Drop • Battery Runtime • PCB Trace Width • LED Strip Power Digital & Control • PWM & Frequency • I²C Pull-up Resistor • 555 Timer REFERENCES • ESP32 Pinout • Arduino Uno Pinout • Raspberry Pi GPIO • RJ45 T568A / T568B • Common I²C Addresses • SI Prefix Reference Every tool is designed for practical electronics work rather than classroom exercises. Whether you're designing an ESP32 project, sizing LED resistors, checking voltage drop, calculating RC timing, or selecting PCB trace widths, Ohmica helps you get answers without opening a browser or doing calculations by hand. HISTORY & FAVORITES • Save calculations for later • Restore previous inputs instantly • Favorites and recent tools • Search tools quickly • Keep frequently used tools within easy reach OHMICA PRO Unlock advanced professional tools with a one-time purchase. Pro includes: • E-Series Component Picker • Logic Levels • Voltage Regulator • Power Budget • UART Calculator • SPI Calculator • Transistor Switch Calculator • Export History • Future Pro tools No subscription. No recurring fees. Pay once, use forever. If Ohmica saves you time on the bench, Ohmica Pro helps support continued development while keeping the app independent and ad-free. The calculator your multimeter doesn't have.