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+--- Thread: SHT30 temp/humidity i2c sensor to Kincony B8 (/showthread.php?tid=9148)
SHT30 temp/humidity i2c sensor to Kincony B8 - zbarothi - 03-20-2026
Hi,
I am trying to connect an SHT30 temperature and humidity i1c sensor to a Kincony B8 using free GPIOs 47 and 48. https://shop.kincony.com/products/sht30-temperature-and-humidity-sensor-probe-module-i2c-communication-cable
I have ESPHome firmware on the board with this config:
i2c:
- id: bus_b
sda: GPIO47
scl: GPIO48
scan: true
frequency: 100kHz
sensor:
- platform: sht3xd
i2c_id: bus_b
address: 0x44
update_interval: 60s
temperature:
name: "Homerseklet"
device_class: "temperature"
state_class: "measurement"
humidity:
name: "Paratartalom"
device_class: "humidity"
state_class: "measurement"
I have tried many variations, switching the SDA and SCL etc but no luck. The device is not detected. Am I using the correct GPIOs? (see attached photo)
black -> ground
yellow -> 47
blueish green -> 48
red -> 3V
RE: SHT30 temp/humidity i2c sensor to Kincony B8 - admin - 03-20-2026
can you try exchange pin define of SDA and SCL?
RE: SHT30 temp/humidity i2c sensor to Kincony B8 - zbarothi - 03-20-2026
(Yesterday, 11:14 AM)admin Wrote: can you try exchange pin define of SDA and SCL?
Tried that, also to physically change the wires. Tried on GPIO07&40 as well, 47&40. No luck. Also tried 013&14. Tried with lower frequency, cut the wire shorter to reduce resistance.
[22:20:29.328][C][i2c.idf:092]: I2C Bus: [22:20:29.328][C][i2c.idf:093]: SDA Pin: GPIO13 [22:20:29.328][C][i2c.idf:093]: SCL Pin: GPIO14 [22:20:29.328][C][i2c.idf:093]: Frequency: 10000 Hz [22:20:29.333][C][i2c.idf:106]: Recovery: failed, SCL is held low on the bus [22:20:29.333][C][i2c.idf:113]: Results from bus scan: [22:20:29.333][C][i2c.idf:115]: Found no devices
I think I will give up at this point and order another RS485 version.
RE: SHT30 temp/humidity i2c sensor to Kincony B8 - admin - 03-20-2026
next week , i will test it, feedback to you.
RE: SHT30 temp/humidity i2c sensor to Kincony B8 - admin - 03-21-2026
take a photo of your SHT30 sensor, our sensor is RED,BLACK,YELLOW,WHITE 4 cables.
RED: power
BLACK: GND
YELLOW: SCL
WHITE: SDA