Hi
everyone! I’ve recently started working with a tiny, super affordable
microcontroller board called the ESP32-C3 Super Mini, which comes with
both Wi-Fi and Bluetooth. Part of the ESP32 Super Mini series, this
little board has quickly become a go-to for makers and developers, since
it squeezes the full power of an ESP32 into a thumb-sized package.
If
you’re subscribed to my channel, you would have probably seen me using
it in my last three projects. It’s single-core, compact, lightweight,
and can be programmed using the Arduino IDE.
While these boards are great, I noticed they occasionally drop off the network. When that happens, the only fix is to physically go and reboot them to bring them back online. After getting frustrated with this, I started looking into ways to solve this problem. In this tutorial, I'll go over three methods that has actually worked for me to fix this problem.
Apparently, the ESP32-C3 Super Mini disconnecting from the network is a known issue, usually caused by a combination of hardware design flaws and software settings. While a permanent fix can be tricky to find, there are several effective workarounds you can try.
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⚙️ Software Configuration
Reducing
the radio power is the #1 most recommended fix. The voltage regulator
often cannot handle the default 19.5dBm peak power, causing
disconnection. Running Bluetooth and Wi-Fi simultaneously can also
overload the single-core chip.
Manually set the TX Power to 8.5dBm or
10dBm in your code. Try older or different firmware builds, or disable
Bluetooth if you are not using it. When the device connects to the
network but disconnects under load (e.g., when sending data), the TX
Power fix is highly likely to solve your problem.
--------
Code:
Arduino
--------
///// To Set The Max TYX Speed /////
#include "esp_wifi.h"
void setup() {
// Set max TX power to 8.5 dBm (the most stable value reported by users)
esp_wifi_set_max_tx_power(WIFI_POWER_8_5dBm);
// Your normal Wi-Fi initialization here
WiFi.begin(ssid, password);
}
yaml
----
wifi:
output_power: 8.5dB
///// To Disable Bluetooth Controller /////
#include "esp_bt.h"
void setup() {
// Disable Bluetooth controller
esp_bt_controller_disable();
}
⚡ Power Supply
The
ESP32-C3 draws high current peaks (upto 500mA) when transmitting over
Wi-Fi. A weak USB cable, a poor-quality regulator on the board, or an
unstable power source can't keep up, causing a reset, crash or
brownouts.
I recommend using a high-quality USB cable and a powered
USB hub. Adding a 10µF to 100µF low-ESR capacitor between the 5V and GND
pins near the board can stabilize power.
If none of these steps
work, you may have a faulty board. Unfortunately, quality control on
these very cheap modules is inconsistent, and sometimes the only
reliable solution is to purchase a replacements from a different vendor.
📡 Antenna & RF Interference
The
PCB SMD ceramic antenna is sensitive. Plugging a pin header into GPIO20
or GPIO21 or having stray wires near the antenna can detune it, killing
Wi-Fi connectivity. It can also be due to poor quality control during
production, leading to outright faulty modules.
Keep all wires and
metal objects away from the antenna area. If possible, inspect the
antenna solder joint for a poor connection.
The ceramic antenna sits
very close to the crystal. Its feed pad is on the left, while the
opposite end is left unconnected. Many hobbyists simply scrape off the
ceramic component and solder a 31mm looped copper wire directly to the
pad, creating a standard quarter-wave whip antenna that immediately
resolves range issues.
⚙️ A final tip before we go
The USB and
boot modes can sometimes be bit finicky. A common trick is to remove
the board from a breadboard while flashing it, as the metal contacts on
the breadboard can interfere with the signal.
Metal object, hands or metal enclosure directly over the antenna kills the range and stability.
Also please make sure the Wi-Fi channel you are using is not too much congested.
Drop a comment and subscribe for more DIY tech reviews and projects like this.
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Thanks
Thanks again for checking my post. I hope it helps you.
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Where To Buy:
Buy ESP32-C3: https://s.click.aliexpress.com/e/_c4SscvK9
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