Wiring

Direct connection to the BMS

WEMOS D1 Mini

If you supply the Wemos externally with power: NEVER use for example 5V output of the battery or similar. ALWAYS use a separate USB power supply (cell phone charger). Otherwise there is a risk that the Wemos will be destroyed!

We assume no warranty and / or recourse for destroyed devices.

Optional Features

Pin D8 of the Wemos is for the wake. Please connect according to wiring, NEVER connect the pin directly to the BMS!

Pin D5 of the Wemos is for the relay. However, this requires a relay with driver module. NEVER connect a "naked" relay to the pin!

ESP-01

We assume no warranty and / or recourse for destroyed devices.

Connection via USB cable from BT dongle

WEMOS D1 Mini

⚠️ WARNING: Daly has launched the new WIFI+BT dongles on the market. These differ completely in the pin assignment from the old BT dongle. Both the pin assignment and the power supply (now 12V instead of the previous 3.3V) are different. If you buy a new BMS that comes with a WIFI+BT dongle, NEVER connect the supplied cable to your circuit board. We are currently working on a solution for this.

🚨 This graphic has been removed for security reasons. It is no longer compatible with the new WIFI+BT dongles from Daly and would cause hardware damage.

If you supply the Wemos externally with power: NEVER use for example 5V output of the battery or similar. ALWAYS use a separate USB power supply (cell phone charger). Otherwise there is a risk that the Wemos will be destroyed!

We assume no warranty and / or recourse for destroyed devices.

Optional Features

Pin D8 of the Wemos is for the wake. Please connect according to wiring, NEVER connect the pin directly to the BMS!

Pin D5 of the Wemos is for the relay. However, this requires a relay with driver module. NEVER connect a "naked" relay to the pin!

ESP-01

⚠️ WARNING: Daly has launched the new WIFI+BT dongles on the market. These differ completely in the pin assignment from the old BT dongle. Both the pin assignment and the power supply (now 12V instead of the previous 3.3V) are different. If you buy a new BMS that comes with a WIFI+BT dongle, NEVER connect the supplied cable to your circuit board. We are currently working on a solution for this.

🚨 This graphic has been removed for security reasons. It is no longer compatible with the new WIFI+BT dongles from Daly and would cause hardware damage.

We assume no warranty and / or recourse for destroyed devices.

Warnings and notes

⚠️ A simultaneous connection of the WEMOS/ESP and the BT dongle does NOT work!!! Don't even try it! ⚠️

🚨 For a given occasion: 🚨

No matter whether you have a self-made board or one of our boards. Never (never never!) supply them either via the BMS externally with power supply via the Wemos, nor with several BMS connect several Wemos via the same power supply! If you connect batteries in parallel, you will build a GND loop. If you connect batteries in series, you short-circuit the batteries (minus of battery 1 is not equal to minus of battery 2, etc.).