UtilitechAS.amsreader-firmware/web/firmware.html

<div class="alert alert-danger">
    WARNING: Units powered over M-bus must be connected to an external power supply during firmware upload. Failure to do so may cause power-down during upload resulting in non-functioning unit.
</div>
<div class="alert alert-warning">
    Your board is using {chipset} chipset. Only upload firmware designed for this chipset. Failure to do so may result in non-functioning unit.
    <span id="fwDownload" style="display: none;"><br/>Download latest firmware file <a  id="fwLink" href="#" data-chipset="{chipset}">here</a></span>
</div>

<form method="post" enctype="multipart/form-data" class="upload-form">
    <div class="my-3 p-3 bg-white rounded shadow">
        <div class="row">
            <div class="col-lg-6">
                <div class="input-group mb-3">
                    <div class="input-group-prepend">
                        <span class="input-group-text">Upload</span>
                    </div>
                    <div class="custom-file">
                        <input name="file" type="file" class="custom-file-input" id="fileUploadField">
                        <label class="custom-file-label" for="fileUploadField">Choose file</label>
                    </div>
                </div>
            </div>
        </div>
    </div>
    <hr/>
    <div class="row form-group">
        <div class="col-6">
            <a href="javascript:history.back();" class="btn btn-outline-secondary">Back</a>
        </div>
        <div class="col-6 text-right">
            <button class="btn btn-primary">Upload</button>
        </div>
    </div>
</form>