Connecting Two Sensor

riyazmullaji2003 · July 2, 2024, 8:17am

How can we connect two sensors on the bolt wifi module?

drushtant1209 · July 2, 2024, 12:49pm

Even if there’s only one 5V pin on your Bolt WiFi module, you can still power multiple sensors by using a breadboard or by connecting the sensors in parallel. Here’s how you can do it:

Using a Breadboard

A breadboard allows you to distribute power to multiple components easily.

Connect the Bolt WiFi Module to the Breadboard:
Place the Bolt module on the breadboard so that the 5V and GND pins are accessible.
Power Distribution:
Use jumper wires to connect the 5V pin from the Bolt module to the positive rail (red line) of the breadboard.
Use another jumper wire to connect the GND pin from the Bolt module to the negative rail (blue line) of the breadboard.
Connect Sensors to the Breadboard:
Connect the VCC pin of each sensor to the positive rail (red line) on the breadboard.
Connect the GND pin of each sensor to the negative rail (blue line) on the breadboard.
Connect Data Pins:
Connect the data output pin of the first sensor to GPIO 0 (A0) on the Bolt module.
Connect the data output pin of the second sensor to GPIO 1 (A1) on the Bolt module.

Using Jumper Wires Directly

If you prefer not to use a breadboard, you can directly connect multiple sensors in parallel:

Power Connections:
Connect the VCC pin of the first sensor to the 5V pin of the Bolt module.
Use a jumper wire to connect the VCC pin of the second sensor to the VCC pin of the first sensor.
Similarly, connect the GND pin of the first sensor to the GND pin of the Bolt module.
Use a jumper wire to connect the GND pin of the second sensor to the GND pin of the first sensor.
Data Connections:
Connect the data output pin of the first sensor to GPIO 0 (A0) on the Bolt module.
Connect the data output pin of the second sensor to GPIO 1 (A1) on the Bolt module.

Breadboard Method

Bolt Module → Breadboard
5V (VCC) → Red rail
GND → Blue rail

Sensor 1 (e.g., Temp Sensor):
VCC → Red rail
GND → Blue rail
Data → A0

Sensor 2 (e.g., Light Sensor):
VCC → Red rail
GND → Blue rail
Data → A1

Direct Jumper Method

Bolt Module Sensor 1 Sensor 2
5V (VCC) —> VCC ------> VCC
GND ---------> GND ------> GND
A0 -------------------> Data
A1 -------------------> Data

By following these methods, you can connect multiple sensors to a single 5V pin on your Bolt WiFi module.

sneharsh.kerkar · July 2, 2024, 12:55pm

Hi @riyazmullaji2003

You can use a breadboard to connect 2 sensor on the bolt wifi module. @drushtant1209 has given a good explanation on how you can approach this.

ghuraiyaromil420 · July 4, 2024, 12:18pm

To connect two sensors to the Bolt WiFi module, you can use the available GPIO pins and follow these steps:

Identify Sensor Pins:

Determine the power (VCC), ground (GND), and data (signal) pins of each sensor.

Connect Power and Ground:

Connect the VCC pin of each sensor to the 5V (or 3.3V, depending on the sensor) pin on the Bolt module.
Connect the GND pin of each sensor to the GND pin on the Bolt module.

Connect Data Pins:

Use two different GPIO pins on the Bolt module for the data pins of the sensors. For example, you can use GPIO0 (pin D0) and GPIO1 (pin D1) for the data pins.

Wiring Example:

Sensor 1:
- VCC to 5V
- GND to GND
- Data to GPIO0 (D0)
Sensor 2:
- VCC to 5V
- GND to GND
- Data to GPIO1 (D1)

Write Code:

In your code, initialize the GPIO pins for the sensors and read data from them.
Example (using Python with Bolt Cloud API):

python

Copy code

from boltiot import Bolt
import time

# Replace 'XXXX' with your API key and 'YYYY' with your device ID
api_key = 'XXXX'
device_id = 'YYYY'
bolt = Bolt(api_key, device_id)

while True:
    sensor1_data = bolt.analogRead('A0')  # Assuming analog sensor on A0
    sensor2_data = bolt.digitalRead('D1') # Assuming digital sensor on D1
    print("Sensor 1 Data: ", sensor1_data)
    print("Sensor 2 Data: ", sensor2_data)
    time.sleep(5)

Test and Debug:

Upload the code to the Bolt module and monitor the readings from both sensors.
Adjust the connections and code as needed based on the sensor specifications.

By following these steps, you can connect and read data from two sensors using the Bolt WiFi module.

gawadevivek2793 · July 4, 2024, 2:19pm

@riyazmullaji2003 you can connect two sensors on the Bolt Wifi Module using the breadboard they have provided in the kit.

pranav.kundaikar · July 8, 2024, 10:54am

@riyazmullaji2003 There is an error in the above replies. There is no A1 pin on the Bolt module.
If you have 1 analog sensor and 1 digital sensor then you can connect them to the A0 and pin 0 on the Bolt module.

If both sensors are analog sensors, you can use an Arduino to connect the sensors and read the data and then interface the Bolt module with the Arduino to send the data to the Bolt Cloud.

sanomajhi2002 · July 23, 2024, 12:10pm

Hi, You cannot connect two analog input sensors in bolt module because there is only one A0 pin. Instead , you can use arduino uno for connecting the sensors and connect to bolt via Uart connection for data collection in bolt module. But you can connect one input analog sensor and output digital sensor in Bolt Module.

102214002 · July 23, 2024, 12:33pm

Hi Ritik Mehta here ,
I would like to add on riyazmullaji2003’s suggestions by an example : if you have a LM35 and a buzzer ( see Bolt IoT kit ) , you can connect both to have a project in which when the temperature rises the buzzer will start buzzing(fire alarm system , fridge door left open ,etc.) I have done this experiment as a small self do project to test the kit. I have shared the pic ,explaining the connections perfectly.

LM35:
VCC pin is connected to 5V
GND pin of LM35 to GND of bolt module.
Data to A0.

Buzzer:
Positive leg in pin0 .
negative leg in ground pin

A simple python scripting will suffice as taught in the course.

gawadeprasad0198 · September 28, 2024, 7:09am