Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various sensors, a display, a microcontroller, and a communication module. The circuit is designed to interface multiple I2C devices with a Nucleo WB55RG microcontroller, display data on an OLED screen, and communicate via a Sim800l module. Power is supplied by a 3.7V LiPo battery.

Component List

1. 16304-SparkFun Qwiic TMP102 Digital Temp Sensor

   • Description: Digital temperature sensor
   • Pins: GND, 3.3V, SDA, SCL, !ALERT

2. MAX30102

   • Description: Pulse oximeter and heart-rate sensor
   • Pins: VIN, SDA, SCL, GND, RD, IRD, INT

3. Sim800l

   • Description: GSM/GPRS module
   • Pins: NET, RST, VCC, RXD, TXD, GND

4. 0.96" OLED

   • Description: OLED display
   • Pins: GND, VDD, SCK, SDA

5. 3.7v LiPo

   • Description: Lithium polymer battery
   • Pins: +Ve, GND

6. Nucleo WB55RG

   • Description: Microcontroller board
   • Pins: I2C3_SCL, I2C3_SDA, 5V, GND, 3.3V, INT, USART1_RX, USART1_TX

Wiring Details

16304-SparkFun Qwiic TMP102 Digital Temp Sensor

• GND connected to GND of Nucleo WB55RG and MAX30102
• 3.3V connected to 3.3V of Nucleo WB55RG and VIN of MAX30102
• SDA connected to I2C3_SDA of Nucleo WB55RG, SDA of MAX30102, and SDA of 0.96" OLED
• SCL connected to I2C3_SCL of Nucleo WB55RG, SCL of MAX30102, and SCK of 0.96" OLED

MAX30102

• VIN connected to 3.3V of Nucleo WB55RG and 3.3V of 16304-SparkFun Qwiic TMP102 Digital Temp Sensor
• SDA connected to I2C3_SDA of Nucleo WB55RG, SDA of 16304-SparkFun Qwiic TMP102 Digital Temp Sensor, and SDA of 0.96" OLED
• SCL connected to I2C3_SCL of Nucleo WB55RG, SCL of 16304-SparkFun Qwiic TMP102 Digital Temp Sensor, and SCK of 0.96" OLED
• GND connected to GND of Nucleo WB55RG and GND of 16304-SparkFun Qwiic TMP102 Digital Temp Sensor
• INT connected to INT of Nucleo WB55RG

Sim800l

• VCC connected to +Ve of 3.7v LiPo
• RXD connected to USART1_RX of Nucleo WB55RG
• TXD connected to USART1_TX of Nucleo WB55RG
• GND connected to GND of 3.7v LiPo

0.96" OLED

• GND connected to GND of Nucleo WB55RG
• VDD connected to 5V of Nucleo WB55RG
• SCK connected to I2C3_SCL of Nucleo WB55RG, SCL of MAX30102, and SCL of 16304-SparkFun Qwiic TMP102 Digital Temp Sensor
• SDA connected to I2C3_SDA of Nucleo WB55RG, SDA of MAX30102, and SDA of 16304-SparkFun Qwiic TMP102 Digital Temp Sensor

3.7v LiPo

• +Ve connected to VCC of Sim800l
• GND connected to GND of Sim800l

Nucleo WB55RG

• I2C3_SCL connected to SCL of 16304-SparkFun Qwiic TMP102 Digital Temp Sensor, SCL of MAX30102, and SCK of 0.96" OLED
• I2C3_SDA connected to SDA of 16304-SparkFun Qwiic TMP102 Digital Temp Sensor, SDA of MAX30102, and SDA of 0.96" OLED
• 5V connected to VDD of 0.96" OLED
• GND connected to GND of 16304-SparkFun Qwiic TMP102 Digital Temp Sensor, GND of MAX30102, and GND of 0.96" OLED
• 3.3V connected to 3.3V of 16304-SparkFun Qwiic TMP102 Digital Temp Sensor and VIN of MAX30102
• INT connected to INT of MAX30102
• USART1_RX connected to RXD of Sim800l
• USART1_TX connected to TXD of Sim800l

Code

No code is provided for this circuit.