M5Stack Fire has occupied GPIO16 / 17 to connect with the PSRAM by default, it's conflict with TXD / RXD (GPIO16, GPIO17) of SIM800L module. Therefore, when using the SIM800L module with the M5Stack Fire, you might have to cut the TXD and RXD from SIM800L module and wire fly to another set of UART pin
| Resources | Parameter |
| Net weight | 17g |
| Gross weight | 27g |
| Product Size | 54.2*54.2*12.8mm |
| Package Size | 60*57*17mm |
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