World's Smallest Programable INDUSPHONE DESIGN
Electronics For You|November 2024
This is the second part of designing the world’s smallest phone, where the UI is integrated with the basic functions of the phone.
ASHWINI KUMAR SINHA
World's Smallest Programable INDUSPHONE DESIGN

Previously, the Indusphone user interface (UI) was designed and the GSM module was tested, integrating it with the IndusBoard coin to advance the design. This segment combines the UI with such functions as contacts and calculator. The connections established in part 1, published in EFY’s October issue, remain unchanged. The focus now shifts to software and UI integration for the IndusBoard phone.

The initial step involves integrating fundamental functions like dialling a number, making calls, checking call status, handling incoming calls, and displaying the idle screen within the previously designed UI. Fig. 1 illustrates the IndusBoard phone.

Integrating the calling system

In the code, the GSM call library and the TFT_eSPI libraries combine into a single codebase. An idle screen is created to monitor incoming calls, battery status, and signal strength in a continuous loop. When a call comes in, the UI transitions to display the ‘attend’ and ‘end’ buttons. The function to attend the call is activated when the attend button is touched on the UI. The code checks the UI input; if the input is ‘attend’ or ‘end,’ it navigates to the corresponding screen and executes the appropriate function using the `call.answer();` and `call.hangup();` commands. Fig. 2 provides a code snippet for TFT_ eSPI, while Fig. 3 depicts the initial idle screen code, which checks for incoming calls, network connectivity, and battery levels.

Bu hikaye Electronics For You dergisinin November 2024 sayısından alınmıştır.

Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.

Bu hikaye Electronics For You dergisinin November 2024 sayısından alınmıştır.

Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.

ELECTRONICS FOR YOU DERGISINDEN DAHA FAZLA HIKAYETümünü görüntüle
TRULY INNOVATIVE ELECTRONICS -INNOVATION UPDATES
Electronics For You

TRULY INNOVATIVE ELECTRONICS -INNOVATION UPDATES

Amongst numerous press releases of new products received by us, these are the ones we found worthy of the title Truly Innovative Electronics

time-read
4 dak  |
December 2024
Elastomer enhancing smart wearable performance
Electronics For You

Elastomer enhancing smart wearable performance

A high-tech, flexible wearable device made from the innovative elastomer material

time-read
1 min  |
December 2024
Nanotechnology based noninvasive cancer diagnostics
Electronics For You

Nanotechnology based noninvasive cancer diagnostics

Nanoflake sensors built from indium oxide with platinum and nickel detect changes in isoprene

time-read
1 min  |
December 2024
Space communication with silent amplifiers
Electronics For You

Space communication with silent amplifiers

In the new communication system from researchers at Chalmers University of Technology, in Sweden, a weak optical signal (red) from the spacecraft's transmitter can be amplified noisefree when it encounters two so-called pump waves (blue and green) of different frequencies in a receiver on Earth.

time-read
1 min  |
December 2024
Advancements in TOPCon solar cells
Electronics For You

Advancements in TOPCon solar cells

The structure and performance of tandem devices with highly passivated TOPCon bottom cells

time-read
1 min  |
December 2024
Quantum leap in magnetism refines superconductors
Electronics For You

Quantum leap in magnetism refines superconductors

Rice University physicists have uncovered key magnetic and electronic properties in kagome magnets, structures resembling basket-weaving patterns.

time-read
1 min  |
December 2024
Sensor targets food antioxidants
Electronics For You

Sensor targets food antioxidants

A research team from Hunan City University and Xiangtan University in China has developed a sensor for detecting TBHQ, a food antioxidant used in oils and fats, addressing health concerns at high concentrations.

time-read
1 min  |
December 2024
Data sensing with repurposed RFID tags
Electronics For You

Data sensing with repurposed RFID tags

UC San Diego researchers have advanced passive data collection with a breakthrough in battery-free sensing.

time-read
1 min  |
December 2024
Seal-inspired sensors to safeguard offshore wind farms
Electronics For You

Seal-inspired sensors to safeguard offshore wind farms

Schematic structure of the seal whisker-inspired flow sensors

time-read
1 min  |
December 2024
Artificial nose identifies scents accurately
Electronics For You

Artificial nose identifies scents accurately

Artificial nose identifies scents accurately

time-read
1 min  |
December 2024